[Sparkle] dreaded update error

[Jeremy Matthews]

OK...been poking around and found something else interesting.

Making no changes in my appcast, files, or site....I notice something  
interesting...

I have an app, version 4.2....both the 4.2 and 4.3 releases are  
embedded in the appcast.
If I use the 4.2 app, and try to update, I get the update error.
If I use my own copy of the 4.3 app, it finds the appcast correctly  
and offers an update!

So, my apps can update themselves to their current version, but not  
to a higher version. In other words, if I run the 4.2 app, it won't  
offer the 4.3 update....that bombs out. But, If I run my own local  
copy of the 4.3 app, it will find and offer the 4.3 update....only  
difference between the apps is the version string in info.plist in  
the Xcode project.

Weird, eh?