The following was performed on Ubuntu 12.04 64 bit. QT and daemon source compiled without issue.
Confirmed that the new client appears to generate stake blocks correctly. (Had older coins available that were stakeworthy.)
Status: 4363 confirmations
Credit: 0.039441 CAP
Net amount: +0.039441 CAP
Transaction ID: a40bbf7671c8ff14f8ab0d9fd94b2503e4caebd0de7c2a8669bc0a41726a32d4
Confirmed solo mining to the wallet is also functional (verified internal CPU, and RPC/GPU mining).
Status: 3897 confirmations
Date: 30 May 2014 17:50
Source: Generated
Credit: 10.00 CAP
Net amount: +10.00 CAP
Transaction ID: a5a018de920af7a4096c35d19585ed55f8dc55602c7fd700c23ceb6d94072d92
Confirmed that the beta wallet is backwards compatible with the original wallet (ftm).
Confirmed coins could be sent/received.
Confirmed wallet.dat could be opened from both clients (not simultaneously), performed multiple times with no issues.
Confirmed all coins mined on the new wallet were available from the old wallet and vice-versa.
Confirmed stability, ran 72+ hours. No memory leaks, no thread locking.
Also performed some cursory validation on the new coin control features, and new functionality in the debug console. And no issues to report!
It's all looking REALLY REALLY good! Incredible functionality for a "beta".
Thanks!.
I am still looking for confirmation about a PoS. I have testnet running now. So hopefully that will answer my questions.