A difference between 2.6 and 3.0beta is that ClassPool#get() in 3.0beta
calls ClassLoader#getResource() although 2.6 calls
If you use 3.0beta, your ClassLoader must define both getResource()
I'll put this info into javadoc.
As for release schedule, 3.0RC1 will be released by this weekend.
I recommend 3.0RC1, which will be fully compatible to 3.0.