currently using VN 4.3.5.2.0 build: 4.3.5.2.11.fc21. Linux fedora 21, KDE desktop. When using writer, it frequently freezes up the complete linux system and I have to force a reboot. I believe the fault also happened with the previous version of libreoffice. It doesn't seem to be a particular activity although I believe 'find and replace' or saving the file. Almost every time I've used writer recently does it. I write short stories with editing and revising so am using libreoffice a lot. I am becoming extremely frustrated and am looking for a replacement word processor.
This will be difficult for us to identify/fix unless we can reproduce it. Does it also happen if you reset your user profile? https://wiki.documentfoundation.org/UserProfile#Resolving_corruption_in_the_user_profile
You could also try a parallel install of 4.4.x https://wiki.documentfoundation.org/Installing_in_parallel/Linux http://www.libreoffice.org/download/libreoffice-fresh/ Setting to NEEDINFO while we wait for further information.
Tried resetting profile. Appears to have solved it. I've been very slow responding because I have had very little need to use libreoffice lately and therefore couldn't be sure it had been solved. Thanks for all your help, please regard the problem as solved.
Thanks, I'll tweak the status to be WORKSFORME.