Stepmania can't open .jpg backgrounds?

[MarioNintendo]

I recently downloaded odipack3 and, upon trying to play it out, I started getting this error on almost every song in the pack:



Granted, I got this error in the past and didn't make a big deal out of this, but now it is rendering stepmania unuseable. After clicking "ok", the song selection wheel keeps on spinning by itself (because it doesn't know I removed my finger from the right arrow) and generates more error messages, which again repeat this process that keeps me from selecting songs.

I assume this is an isolated problem. Is this a current problem with the version of stepmania I'm using? Does playing on a mac have anything to do with that? Thanks.