[plt-scheme] Automatic recompilation of source files with new versions of PLT Scheme

>
> This should happen automatically for the .zo files that DrScheme
> itself manages. Just to double check: you got this message while
> hitting "run" from inside DrScheme and the language was the module
> language (and automatic compilation was not disabled)?

Yes, exactly.

Maybe I should tell you that the sources were not compiled by  
DrScheme, but by the plt-r6rs script, in case that makes a difference.

Thanks for trying to track this problem down.

-Tom Gordon