Not a big deal, but I noticed that out of the 4 themes you can choose - standard / plastic / gtk+ / gleam, it seems like plastic is missing the application title.
If you collapse a window to the point where it is just a small vertical sliver, you can't tell what the application is before you open it. It you have many collapsed windows as vertical slivers, it makes it a bit harder to remember just what they are.
You can see the application title with standard, gtk+, and gleam themes when minimized to a ribbon, but not plastic. Not sure if the plastic theme is designed not to show it?
With the 32-bit versions of TC, where the window title is at the top, and you can only minimize without seeing the window at all, rather than using the option of a rolled-up ribbon, not an issue.
Anyway, this is just a very very small graphical issue I just noticed and does not really affect my love of TC!