0.8 should be able to run in the same cluster as 0.7. AES uses java serialization which means that Token serialization stands a good chance of being brittle. This needs to be fixed.
1. place a hard-coded serialVersionUID for Token in 0.7.5.
2. have AES use ICompactSerializer in place of ObjectInputStream in 0.8.
This would be a good opportunity to audit the code for imprudent uses of Object[Input|Output]Stream and get those cleaned up. Also, it will exercise the versioning code a bit.