In the short term run calibre from a terminal as calibre (without --detach) and the crashes will not occur. The proper fix will be in the next release.
For windows xp users experiencing crashes:
I'm afraid you will have to stay with calibre 1.48 until you are ready to upgrade your windows. I simply cannot get Qt 5 to work well on windows xp, sorry.
Glad to hear it, I am closing this bug report.
Summary:
For linux users experiencing crashes:
In the short term run calibre from a terminal as calibre (without --detach) and the crashes will not occur. The proper fix will be in the next release.
For windows xp users experiencing crashes:
I'm afraid you will have to stay with calibre 1.48 until you are ready to upgrade your windows. I simply cannot get Qt 5 to work well on windows xp, sorry.