I have switched back to version 1.7.5 and the bug happens there also. I guess that the crash files are related to 1.7.5, but it happens in both versions.
When I opened the bug this morning, I added 5 crash files. Any way, I'm adding them again.
If more are needed, please let me know
5 recent crash files
I added a crash file from 1.7.9 as well