"Save As" still prompts on files set to open with default application

[soyabeaner]

Unfortunately it's not that simple. The problem remains after I disabled all extensions and restarted Cent. However, resetting settings to default fixed it too, so this implies there's some setting(s) that's involved. Unless Internet Download Manager somehow mucked it up, but I don't use it as Cent's default downloader...

Edit: Nope. I just tested it with IDM extension removed and disabled IDM's Chrome integration and problem remains.