The current versions of LO have a bug which results in an application crash when certain files are opened. This was reported here:
While Linux users can see that there was an application crash (SIGSEGV), Windows users only notice that LibreOffice "freezes". It is no longer possible to close the application normally. Users have to kill it with the task manager. The test was done with 64 bit Windows 8.1.
Bugs like the one which triggered this report (which will be fixed in the next releases) can also occur in future versions of LibreOffice. They should be handled in a better way: the user must be noticed that there is a problem with the software. Ideally it should be possible to file a crash report. A minimum solution could show a dialog box and allow termination of LibreOffice.
Tor: thought you might be interested in this one.
I don't think we can do much about the behavior we have on crashing under windows. The bug that triggered this thought is fixed now though.