Glitch with the Minimize/Maximize/Close buttons

I thought this might draw a blank given how odd it is.

Further investigation seems to indicate that it's actually a problem with Excel rather that a specific file. I removed all auto-shapes from the file, saved it, then upon reopening the file the issue no longer seemed to occur. However, it seems to occur on any file that contains an auto-shape or image.

I have uploaded a short screen capture to show it happening to see if anyone recognizes the issue, or what might have caused it. This is performed in a new unsaved workbook.

http://tinypic.com/r/2en3skk/8

From 01-05 seconds you can see the cursor hovering over the column headers and minimize/maximize/close buttons - all appears as normal.

At 09-10 seconds I insert an auto-shape and then repeat the cursor hovering.

From 11:14 seconds you can see the issue happening - note how the minimize/maximize/close buttons light up and flicker when the cursor is over the column headers directly below each button.


In the workbook I originally noticed the problem, I did have macros to change the visible property of 'grouped' shapes, could that have somehow caused this issue as it seems to only happen with inserted objects? Or could I have somehow altered a property at application.object level?

No problems are found when I run the Office diagnostics, so am I faced with a fresh install of Excel?

Any comments welcome.