[DrChiper]

I did a DB maintenance test, and answered yes on the question "Do you want calibre to check if the files in your library match the information in the database?". Thereafter the popup dissapeared and nothing seems to happen (I do have a large DB). So I just thought, ok, all is well and wanted to continue. And then suddenly the "No Problems found" message popped up.

As there is no indication that the test was still running, I might suspect that users can be mislead in believing the test has ended. My humble suggestion: perhaps it is feasible to have an indication via the Jobs running indicator or something similar to avoid that confusion?