Since commit e7c36e60e2cab8c09e31845567e90b887f9f0be7 (Update bootstrap to 2.2.1):
Tooltip for Button inside ButtonGroup is not showing ONLY if ButtonGroup is inside Tab / TabPanel.
There is one other thing:
Buttons inside ButtonGroup (both in and out of Tab / TabPanel) are "flickering" on hover, like they are moving left-right. Like the border is getting thicker so it looks like button moves a little to one side.
This is true ONLY for Buttons that have Tooltip.
Since commit e7c36e60e2cab8c09e31845567e90b887f9f0be7 (Update bootstrap to 2.2.1):
Tooltip for Button inside ButtonGroup is not showing ONLY if ButtonGroup is inside Tab / TabPanel.
There is one other thing: Buttons inside ButtonGroup (both in and out of Tab / TabPanel) are "flickering" on hover, like they are moving left-right. Like the border is getting thicker so it looks like button moves a little to one side. This is true ONLY for Buttons that have Tooltip.