Linux Lite 3.0 Final Released

[JmaCWQ]

I've noticed some theme differences too, I think it's something to do with the differences between Gtk2+ & Gtk3+.
The bottom 2 paragraphs of the 1st reply on that page I think eludes to why some themes work correctly and others don't.
For me Synaptic didn't change themes until after a reboot, VLC didn't until I set Force Window Style to Gtk+.
One I've found that won't change is Unetbootin, it does with the default themes but not with the older themes I  like using.
Those 3 changed soon as applied in 2.8.
Some of the older themes don't even show up in Appearance now, I'm guessing that's because they have no Gtk3+ elements/folder included.