I use TextExpander from Smile Software to do nearly everything on my Mac both personally and professionally. Currently, Excel is doing something that prevents TextExpander from accessing the clipboard the way it has in the past.

I can use TE in Excel just fine *until* I copy something to the clipboard from Excel. At that point, TE stops working correctly. This is fixed by quitting and restarting Excel. I would consider this a bug, and it certainly ruins most of my Excel-related workflows.
I post this here in the hopes that somebody at MS sees it or that some helpful community member can think of a better workaround.