could not reproduce under IE7
this happens with Firefox and IE7 both i had just noticed.
when you click on same panel bar item this is not occuring. but if you click on another panel bar item than it will occur.
For example on online demo,
if you are on
and then click on say column under Data iteration.
unfortunatelly still can't see under FF 3 and IE7.. :(
could be bcoz my internet connection is slow and might be taking some time to load other parts of page.