when enabling color box with drush (which by the way doesn't work as per the README.txt)..
the following error is generated.
Module colorbox cannot be enabled because it depends on libraries (2.x) but 7.x-2.0 is available
Enabling via the modules page succeeds.
It seems that the dependency line in colorbox.info should probably be patched to:
-dependencies = libraries (2.x)
+dependencies = libraries (>2.0)
Not sure that's the problem, since I can enable the module via the UI. I'm moving on.