I finally got around to installing 10.3.3 and now I get this message every time I quit Delphi:
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Anwendungsfehler
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Exception EAssertionFailed in Modul GExpertsRS103.dll bei 00055131.
Call DeactivateFontsInfo before calling this. (D:\source\_sourceforge\GExperts\externalsource\UniSynEdit\SynTextDrawer.pas, Zeile 475).
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OK
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I have been getting a more generic error ever since 10.2 but kind of got used to it. This now is more specific and I'll report it to the GExperts bug tracker as well.