Up until recently, Airmail was a joy to use, now I can't get it to archive my FastMail emails. The archive function works perfectly on my Gmail accounts, but It freezes in FastMail. Attached is a screenshot of what happens when you hit the archive button. The performance has also degraded significantly. This bug appears to have gone away in the new beta, but I am not totally sure. Really this is a plead to release a fixed version as this has destroyed my email workflow.