Hooray! I have found a solution. For anyone who stumbles about it, here's the deal.
Today I found that the window of pending checks was not broken for all solutions, but only for a specific one. In addition, although I did not understand that this was related, every time I opened the solution, I received:
"Some solution related properties could not be read.
The solution I found was here . Turns out I had two
GlobalSection(SourceCodeControl) = preSolution
in the solution file (.sln). I deleted the second (which had a long list of projects, but also some gibberish in it), and the message went away and the Pending Checkins window now works fine.
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