Rebase dialog glitch
When the rebase dialog appears, the dialog shows first the status "Checking..." but it leaves the Rebase button enabled.
Although the checking phase is fast (in my computer at least), if I click on Rebase during it, the operation is performed, but the button is still enabled during all the time the operation lasts. The Abort button is disabled during the whole operation.
It is a minor glitch, but as I use the rebase dialog quite often, I find it disturbing.