GIMP 2.99 bottom portions of dialogs are off-screen when using system theme
Here are two screenshots illustrating a problem when using the system theme:
In SWM, when using the system theme, the bottom portion of the single window is not visible. For example the status bar should be visible but it's not.
In MWM, when using the system theme, the bottom portion of the toolbox is not visible. The toolbox can be resized horizontally, but not vertically.
This is with GIMP git master updated a few minutes ago, running on Gentoo Linux.
These problems don't happen when using @bentou's themes, fwiw.