About 3 days ago, Chromium suddenly disappeared from my XP PRO SP3 Quick Launch bar. Not too worried so I created another shortcut for my desktop but XP will not allow new shortcut to be added to Quick Launch bar. When I drag it to the Quick Launch, the icon turns to an O with a slash mark across it with Quick Launch locked or unlocked.No changes have been made to OS. No registry modifications. No OS updates. No new software installs. Version 9.0.589.0 Ideas?