Here some Informations from my Java Console (but i dont think thats a crash report):
Java Web Start 10.7.2.10
JRE-Version verwenden 1.7.0_07-b10 Java HotSpot(TM) 64-Bit Server VM
Benutzer-Home-Verzeichnis = C:\Users\Martin
----------------------------------------------------
c:   Konsolenfenster löschen
f:   Objekte in Finalisierungs-Queue finalisieren
g:   Garbage Collect
h:   Diese Hilfemeldung anzeigen
m:   Speicherauslastung drucken
o:   Logging auslösen
p:   Proxykonfiguration neu laden
q:   Konsole ausblenden
r:   Policy-Konfiguration neu laden
s:   System- und Deployment-Eigenschaften ausgeben
t:   Threadliste ausgeben
v:   Thread-Stack ausgeben
0-5: Trace-Ebene auf <n> setzen
----------------------------------------------------
	Match: beginTraversal
Match: digest selected JREDesc: JREDesc[version 1.6+, heap=-1-536870912, args=null, href=null, sel=false, null, null], JREInfo: JREInfo for index 0:
    platform is: 1.7
    product is: 1.7.0_07
    location is: http://java.sun.com/products/autodl/j2se
    path is: C:\Program Files\Java\jre7\bin\javaw.exe
    args is: null
    native platform is: Windows, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 2.2.0 found at C:\Program Files\Java\jre7\
    enabled is: true
    registered is: true
    system is: true
	Match: selecting maxHeap: 536870912
	Match: ignoring InitHeap: -1
	Match: digesting vmargs: null
	Match: digested vmargs: [JVMParameters: isSecure: true, args: ]
	Match: JVM args after accumulation: [JVMParameters: isSecure: true, args: ]
	Match: digest LaunchDesc: http://dl.dropbox.com/u/18779594/salem/salem2.jnlp
	Match: digest properties: [-Dhaven.defserv=plymouth.seatribe.se, -Dhaven.resurl=http://plymouth.seatribe.se/res/]
	Match: JVM args: [JVMParameters: isSecure: false, args: -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/salem-res.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: false, args: -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/jogl/jogl.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: false, args: -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/jogl/gluegen-rt.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: false, args: -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/]
	Match: endTraversal ..
	Match: JVM args final: -Xmx512m -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/
	Match: Running JREInfo Version    match: 1.7.0.07 == 1.7.0.07
	 Match: Running JVM args match the secure subset: have:<-Xmx512m>  satisfy want:<-Xmx512m -Dhaven.defserv=plymouth.seatribe.se -Dhaven.resurl=http://plymouth.seatribe.se/res/>
	Match: beginTraversal
Match: digest selected JREDesc: JREDesc[version 0+, heap=-1--1, args=null, href=null, sel=false, com.sun.javaws.jnl.ResourcesDesc@11648e6f, null], JREInfo: JREInfo for index 0:
    platform is: 1.7
    product is: 1.7.0_07
    location is: http://java.sun.com/products/autodl/j2se
    path is: C:\Program Files\Java\jre7\bin\javaw.exe
    args is: null
    native platform is: Windows, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 2.2.0 found at C:\Program Files\Java\jre7\
    enabled is: true
    registered is: true
    system is: true
	Match: ignoring maxHeap: -1
	Match: ignoring InitHeap: -1
	Match: digesting vmargs: null
	Match: digested vmargs: [JVMParameters: isSecure: true, args: ]
	Match: JVM args after accumulation: [JVMParameters: isSecure: true, args: ]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/salem-res.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: true, args: ]
	Match: endTraversal ..
	Match: JVM args final: 
	Match: Running JREInfo Version    match: 1.7.0.07 == 1.7.0.07
	 Match: Running JVM args match: have:<-Xmx512m>  satisfy want:<>
CacheEntry[http://dl.dropbox.com/u/18779594/salem/client-res.jar]: updateAvailable=false,lastModified=Thu Jan 01 01:00:00 CET 1970,length=27865
CacheEntry[http://dl.dropbox.com/u/18779594/salem/salem.jar]: updateAvailable=false,lastModified=Thu Jan 01 01:00:00 CET 1970,length=1319121
	Match: beginTraversal
Match: digest selected JREDesc: JREDesc[version 0+, heap=-1--1, args=null, href=null, sel=false, com.sun.javaws.jnl.ResourcesDesc@4c05279b, null], JREInfo: JREInfo for index 0:
    platform is: 1.7
    product is: 1.7.0_07
    location is: http://java.sun.com/products/autodl/j2se
    path is: C:\Program Files\Java\jre7\bin\javaw.exe
    args is: null
    native platform is: Windows, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 2.2.0 found at C:\Program Files\Java\jre7\
    enabled is: true
    registered is: true
    system is: true
	Match: ignoring maxHeap: -1
	Match: ignoring InitHeap: -1
	Match: digesting vmargs: null
	Match: digested vmargs: [JVMParameters: isSecure: true, args: ]
	Match: JVM args after accumulation: [JVMParameters: isSecure: true, args: ]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/jogl/jogl.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: true, args: ]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/jogl/gluegen-rt.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: true, args: ]
	Match: endTraversal ..
	Match: JVM args final: 
	Match: Running JREInfo Version    match: 1.7.0.07 == 1.7.0.07
	 Match: Running JVM args match: have:<-Xmx512m>  satisfy want:<>
	Match: beginTraversal
Match: digest selected JREDesc: JREDesc[version 0+, heap=-1--1, args=null, href=null, sel=false, com.sun.javaws.jnl.ResourcesDesc@6c9ce1cb, null], JREInfo: JREInfo for index 0:
    platform is: 1.7
    product is: 1.7.0_07
    location is: http://java.sun.com/products/autodl/j2se
    path is: C:\Program Files\Java\jre7\bin\javaw.exe
    args is: null
    native platform is: Windows, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 2.2.0 found at C:\Program Files\Java\jre7\
    enabled is: true
    registered is: true
    system is: true
	Match: ignoring maxHeap: -1
	Match: ignoring InitHeap: -1
	Match: digesting vmargs: null
	Match: digested vmargs: [JVMParameters: isSecure: true, args: ]
	Match: JVM args after accumulation: [JVMParameters: isSecure: true, args: ]
	Match: digest LaunchDesc: http://plymouth.seatribe.se/java/jogl/gluegen-rt.jnlp
	Match: digest properties: []
	Match: JVM args: [JVMParameters: isSecure: true, args: ]
	Match: endTraversal ..
	Match: JVM args final: 
	Match: Running JREInfo Version    match: 1.7.0.07 == 1.7.0.07
	 Match: Running JVM args match: have:<-Xmx512m>  satisfy want:<>
Starting Resource Preloader Hardlinker
JNLPClassLoader: Finding library jogl.dll
Making hard refs for: sun.net.www.protocol.jar.URLJarFile@2621c1f0
Making hard refs for: sun.net.www.protocol.jar.URLJarFile@32985ae9
Making hard refs for: sun.net.www.protocol.jar.URLJarFile@7243871e
Making hard refs for: com.sun.deploy.cache.CachedJarFile@404aada5
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
Making hard refs for: com.sun.deploy.cache.CachedJarFile@66ce4c9c
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
Making hard refs for: com.sun.deploy.cache.CachedJarFile@7207ca7e
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
Making hard refs for: com.sun.deploy.cache.CachedJarFile@5d7f50ae
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
Making hard refs for: com.sun.deploy.cache.CachedJarFile@5189ff76
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
Making hard refs for: com.sun.deploy.cache.CachedJarFile@3ae2c5cc
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSigners()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signersRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getSignerMap()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.signerMapRef
calling noarg method hard ref to com.sun.deploy.cache.CachedJarFile.getCodeSourceCache()
attempting hard ref to com.sun.deploy.cache.CachedJarFile.codeSourceCacheRef
JNLPClassLoader: Finding library jawt.dll
JNLPClassLoader: Finding library jogl_awt.dll
			


 i can go to Boston, Home, Houses - Logins - No crashes. Just sometimes the Client freezes, but it takes bout 20 sec to reconnect then
 i can go to Boston, Home, Houses - Logins - No crashes. Just sometimes the Client freezes, but it takes bout 20 sec to reconnect then 
