There is new Cyrus IMAPd 2.4.9beta2 version available to download.You can download it from the snapshots directory: This is an beta release in the 2.4.x series. It fixes couple of bugs in the "deliver" and lmtp codepaths and adds a couple of wishlist items. It also reverts the LMTP delivery fix for Bug #3163, which was implicated in Sieve issues at FastMail.
WARNING! One known bug that still exists is that quota -f can cause ALL quotaroots to believe they have twice their actual usage. This bug is still present in 2.4.9beta2 as well as beta1. This problem has always existed, but is much worse because of a bug in 2.4.8 where user renames caused quotaroots to become incorrect. The recommended workaround at this time is to run quota -f TWICE any time you need to run it. The first run should fix any incorrect quota roots, and the second run will fix all the doubled quotas caused by the first one.