So I swung by yarn forward on my way back from campus and got the lowdown on my machine... or at least I've got some ideas of what to try. It's a tensions issue (which I suspected) and the lady gave me some tips for how to adjust the bobbin tension. She also suggested that I dust the bobbin case. Apparently setting the thread tensions at 0 was contributing to the skipped stitches; thanks, troubleshooting.
Anyway, I'm eager to wake up and tackle this thing again. Making wallets is addictive, and every time I make one, I learn something that I can change to make them more my style. Today's a rainy, shit-sandwich day and knitting circle is cancelled tonight, so what the hey!