I am cancelling the vote on the seconr RC for Proton 0.10, and will shortly be preparing a third RC.
The changes in RC2 uncovered a issue, that while present previously was not causing an observable problem before hand but now does following the additional validation included in RC2 and this needs a fix. Additionally, the earlier issue with DIGEST-MD5 now has a fix available and this will also be picked up. Robbie