IE8 Favorites Bar Synchronization Bug

I synchronize books via xmarks among IE7, IE8 and firefox. Xmarks do able to synchronize general bookmarks among them. But it could not map favorite bar correctly. IE7 named favorite bar as "Links", while IE8 named it as "Favorites bar".

After synchronized by xMarks, IE8 favorite tool bar show no bookmarks. I opened "Favorites" menu and found two "Favorites bar" folder (refer image), one is empty, the other includes all bookmarks from IE7/Firefox "Links" folder.

I moved all bookmarks from one "Favorites bar" folder to the other one (Empty "Favorites bar" folder), then IE8 tool bar show all bookmarks.

However, as soon as I opened IE7/Firefox in another computer, all bookmarks in favorites tool bar were disappeared. I found two "Links" folder from IE7/Firefox bookmarks menu, one is empty, the other includes all bookmarks I expected.

If I moved all bookmarks from one "Links" folder to empty "Links" folder in IE7. IE7/Firefox toolbar will display them, but IE8 toolbar will display no bookmarks.