I just looked at some error logs that might mean more to someone else...format of "hs_err_pid23271.log". Did you get some of these in your home directory? I've been noticing them since I downloaded the Java2 plugin. An interesting part of it:

An unexpected exception has been detected in native code outside the V
+M.
Unexpected Signal : 11 occurred at PC=0x408764e7
Function name=(N/A)
Library=/lib/libc.so.6

NOTE: We are unable to locate the function name symbol for the error j
+ust occurred. Please refer to release documentation for possible reas
+on and solutions.
[download]

The bug documentation is here. I've only skimmed it, but it looks helpful.

-jenn