About Dialog Hangs on Close
1) Open the About dialog 2) Immediately click the Close button The window will not close. This will hang any parent TortoiseHg window and Windows (the O.S.) may detect the program is not responding.
(Maybe it's waiting for the update thread to finish (?), but this seems to be a bad user experience. Possibly cancel on the update thread, if it's not finished when close is clicked...?)