BUG REPORT: New Subcollection crashes firefox (rarely)

I love Zotero and it has already become indispensable. However, I have had it crash and I have lost data twice in the last week with the following steps:

1. using Zotero normally.
2. Right click a collection and choose New Subcollection...
3. firefox.exe -- Application Error
The instruction at "0x0076b575" referenced memory at "0x00000000". The memory could not be "read".

The problem does not happen every time I add a subcollection like this - only rarely.
This discussion has been closed.