Did you by chance change the toolbar to TEXT ONLY?
In the opera.os2 newsgroup, on Opera's news server, somebody posted that they changed their toolbar to text only, and that Opera crashed the next time they ran it. They fixed it by changed 'Button Type=1' to 'Button Type=0' in OPERA.INI. It's posted as being a reproduceable problem, and the Opera team replied that they've found and fixed the bug.
Darrell Spice, Jr.
[link|http://home.houston.rr.com/spiceware/|SpiceWare] - We don't do Windows, it's too much of a chore