The default theme simply didn't fit my tastes, and the other themes weren't so satisfactory. I spent way too long fiddling with them, and just couldn't be happy.
So I have moved to liquidluck, and am hoping I will not be 'forced' to move again. It's way too much work, and it took multiple messages between me and the developer of this sleek new static site generator just to get it to behave the way I like it.
I had to override stuff that's done by the software, by using this script, which helped give it the advantages that Pelican has over the other generators I mentioned, while also solving the one problem Pelican has.. lack of a good-enough theme. This was achieved with the help of that very helpful and responsive developer.