Writer 4.3 crashes when coping text

I have migrated from LibreOffice 4.2.6 to 4.3.2 on Windows 7. I never really had any big problems with LibreOffice. But now after migration when I paste some text to LibreOffice Writer and crash appears. The biggest problem is, the crash is not reproducible every time. This is very annoying because all of the LibreOffice tools gets closed at this time Writer, Calc, Impress and I need to go through recovery process to get file back.

Does anyone experience the same problem? Is this known bug or something?
How to really diagnose the problem?

This sounds very like my problem, although I’m using Calc; see query ‘Calc keeps crashing…’ posted 10 Oct '14. I am using Windows 8.1 and LibreOffice Have tried resetting my user profile as suggested, not sure yet whether this has fixed it as the problem was intermittent. Dave Oz