Theme Switcher plugin (deprecating gladewin32)
The Quod Libet project has a plugin that is able to set the GTK+ theme of Quod Libet; quodlibet/plugins/events/themeswitcher.py
.
You can use the previous [gajim:changeset:3356 GTK+ theme switcher] of Gajim. This would allow you to waive gladewin32.