When a bookmark or URL handle is dragged to the personal toolbar next to the "Home" and "Bookmarks" buttons, instead of being added to the toolbar as tested on OS X, it merely acts as if were going to be added, then disappears.
Please include your build id.
Build ID 2002091014
Rick, have you recently deleted your personal toolbar (bug 166731)? In the bookmarks manager, if you select a folder, then go to View->Set as Personal Toolbar, does that fix the problem? Does this problem still occur with a newer build? With a new profile?
Resolving due to lack of response from reporter.
Personal Toolbar folder had been mistakenly deleted. When a folder was re-assigned as the Personal Toolbar folder, feature worked as expected.