"CFBundleVersion must be a string" from OS X dashboard.

Question

While developing my dashboard widget, I looked at the console (system logs) and found that an error message:

2009-03-06 22:08:35.244 Widget Installer[3874] CFBundleVersion must be a string

The property is marked as type string in Info.plist. I've tried changing it from a 1.2 number to a series of letters (can't be mistaken for number) and also following apple's versioning guidelines. No mater, what, I get this error every time.

Answer 1

The Widget Installer parses all the existing widgets to check for older versions. This message can come from any widget on your system, and if you've checked your own, it's probably one of the others.