Ok, I see what happened. During the last revision of the timeline mods, the timeline link was copy/pasted from one source. The skins.c file for some reason uses single quotes around URL's. The skins.c file uses two single quotes around the URL's. One doesn't work in the other.

So... I tested all skins and they seem to be working for me. Can you please confirm? Again, open the ticket if it's not.

I also fixed the Black and White theme as the timeline copy/paste didn't include the li elements.