This happens if a XRC files does have a wrong or no version number. I'm afraid you've to disable the plugins step by step to see what causes the issue. The manager and resource XRC files should be in line. An XRC file w/o version number is actually invalid, thats why I added the version number to all. We still have plenty of invalid XRC files, btw... so it could also be another issue.
However, you shouldn't see this in release builds. Its only visible in debug builds. Could you verify this, please?