The new drop-down menu with the Login link seems to appear behind the advert, so you can't actually see or press the Login link. Stock Cyanogenmod browser on an HTC Desire.

Also, smilies seem to stop the page fully loading, sometimes. Not always, but when it does it loads the rest of the page and then the progress bar sticks at halfway and, on the Post screen as an example, the Submit button doesn't work. Pressing the X button to stop loading the page doesn't do anything apart from a "Stopping" message briefly appearing.

These might just be Cyanogenmod bugs, mind.