You’re probably going to need to provide a little more detail than that such as BP and WP versions, custom themes if any or other modifications present.
I took a spare test install to upgrade to BP 1.2.4 to see what the issues were with that release, it’s now running BP 22.214.171.124 on WPMU 2.9.2 and I can drag widgets to the sidebar region without issue.
Henry – I’m having the same problem – Widgets won’t drag. Did you get it fixed and if so, how? Thanks Rhonda
Also, I’ve found that Firefox/Camino are less likely to have the problem than Webkit browsers (Safari, Chrome).
I also agree with you people and this is a very serious problem because no one can di his/her work until and unless this problem is not solved……so the management of the site must take some atep inorder to solve the problem….