Yesterday I uploaded a managed package in "release" mode.  I have uploaded earlier versions of this package in "beta" mode many times before, and they have always installed correctly.

However, my "release" mode package cannot be installed.  Both yesterday and today, when I try to install it, I get this error:



Salesforce, any thoughts on why this is?  In my dev org, the package shows as having uploaded OK and I got the "Your package upload has completed" email.