Error popup:

in the "General" tab:
==============================================
Short description

The application unknown (nspluginviewer) crashed and caused the signal 11 (SIGSEGV).

etc.
==============================================

in the "Backtrace" tab:
==============================================
This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1232673088 (LWP 6831)]
[New Thread -1279566960 (LWP 6839)]
[New Thread -1270363248 (LWP 6838)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
...

(many more identical lines)
==============================================