Does libgrabber verify if files are new?

[tomByrer]

I found a project that seemed to fail to upload the new files after bumping a new release. 2 clues:

• file dates are 2 weeks old after the new 0.3.1
• top-line comment still reads the old 0.3.0 version.

I'd think it would be nice to at least warn of old files, so our admins won't push a non-update update when they're multitasking.