I got a Camera Update, today, for my GO520 (as is typical, it was 4MB in size).
Ran it & the MDC stated it had successfully completed, but the device said it hadn't!
Went back to MDC, it now stated that I had a Camera Update, but only a few 100kB in size!
Ran that & both said it was successful. However, the MDC now said I STILL had a 4MB update.
Ran it again & it was finally successful!