Eric,
I've tried accessing most of my frequently used sites and almost everything is working fine with PWM 1.5.1.b2.
In fact here is the only problem/quirk that I've encountered.
whether or not the Automaticaly populate option is checked on the General TAB, any custom fields from the "Auto-Populate" tab are entered.
This really doesn't affect my usage, just seems that the "Auto-Populate" fileds need a "Automatically Populate" option.
The other problem is with drag and drop to re-order the account list. I drag an account within a group and no matter where I drop it, it ends up as the last account in the group list.