I just sbf back to .340 using linux sbf method and installed the 2 update zips for .602 through clockworkmod then restored my data from a titanium backup I made right beforehand. However, I'm getting a "Download of Update Failed" message every once and awhile, and if I go to do a System Update it says "An update is currently being downloaded..." then the "download of update failed" message follows a few moments later. Everything else seems fine though, .602, .13p, etc.