round(#) is part of the new math functions. To get rid of that error, update to the newest experimental build of Litestep. You can find it in the downloads section at http://lsdev.org/ . It's totally stable, so don't let the "experimental" part worry you.

Not sure about the easymove thing... Boreas might know, if updating the build doesn't fix it.

Btw, you shouldn't be getting that error in FBL Dynamic 1.7. That theme doesn't use any of the new math stuff, or easymove.