In 17.1.532.3067, the Cobalt theme has a thin white/bright color band around some objects, or at least one that my pre-caffeinated brain focuses on. Most notable for me is the main toolbar that is shown when there are no windows nor connections.
If I resize the Toad window smaller, then larger again, the part of the band that was obscured is...muted/endarkenated/themerized.
Not a show-stopper at all, but thought I'd mention it. I can supply screenshots if necessary.
I may have deeper issues. Playing around with this (enabling/disabling/changing Themes), I noticed that my tooltip popups no longer include the keyboard shortcut.
Also, I'm able to see this on all of the themes I checked (getting punched in the eye wasn't fun though), but I do not see it without themes.
Not surprised that the outline is theme related. It took so long to get that looking and working fairly well. Now, we've just updated to the latest version of Delphi to build Toad, and also updated most of our 3rd party components at the same time, so I expect a few little things like this to creep in. I'll keep an eye out for it.
I had to remove the "enhanced" tooltip option in preparation for "the next big thing".