I installed it on a brand new laptop just over a week ago, the only extension I had installed was the google toolbar. I removed that and it did not help, I also reinstalled with no extensions (following instructions on the forum, deleting all leftover files and rebooting too) and that did not help either.

I removed it all again this morning, rebooted and then installed 1.5 and I haven't had a single problem. Plus 1.5 actually seems faster.

cheers,
Luke