Steps to Reproduce:
1. view text file
2. hit <alt>-<leftarrow>, thinking it will go back
3. notice it doesn't, so hit the back button
See attached backtrace.
Created attachment 30908 [details]
gdb backtrace of hp's debug build
The new bonobo may well fix this
I get no kaboom with beta2, I think it was one of the bonobo fixes.