TomJ, I went through your birthdays, but there was nothing out of ordinary. I even added over 150 contacts to my address book to check if it has anything to do with numbers, but Qalendar did not crash, so I still do not have enough info to fix that bug.

I was hoping to quickly track that bug down and release a fix + updated translations, but under these circumstances I decided to not wait and release Qalendar 0.9.1 now (just uploaded it to the autobuilder), which is only about translations.