I had a problem recently where moxxi wouldn't actually hand me the bad touch. She'd say the dialogue ("this isn't my favorite...) but wouldn't actually pull it out. Tried save quitting and clearing out most of my inventory. Is this something that happens to other people?

I think when that happens you can travel out and back in to fix it, but it shouldn't happen if you give her the money a bit slower

Traveling away and back did work. Giving it more slowly didn't seem to work (I put the file in read only to test a bit) but it might be that you have to do it slowly the first time, if it ever locks it doesn't work. Not sure. But traveling out and back (without save quitting worked).