Are existing versions of Je’Tze’s Bell getting changed to BoE in 3.0.8 as well?
Any updates made to items apply to all items. So, yes. (Source)
Haste in Melee
We are looking at the benefits of haste (or lack thereof) for all melee right now. If anything there aren’t enough stats available to make items distinct, so rather [...]

Vehicle Bugs
If you are experiencing vehicle bugs or have experienced vehicle bugs, please feel free to post them in the thread linked below. Please include as much detail as possible when adding to this thread so that we may better find any possible issues.
There are a few bugs right now that seem to be pretty [...]

Hortus updated the 2.4 Known Issues list with several additions (see below):
General
• Players can be randomly ported into the wall or down into the Menagerie while taking control of a chess piece in Karazhan.
UI
• A cursor is not displayed when mousing over NPCs with repeatable quests from range.
Quests
• Completing “Fragmented Magic” does not teach the [...]

Here is part 2 as promised with the NPC issues, environment, UI, and other misc bugs that Blizzard has officially tagged and will fix soon.

There seems to be a serious issue with Guild Banks again, where the withdrawal limit for players is not resetting day to day. As this might actually be a good thing for people trying to secretly steal from the coffers, it’s not so good for guilds (like mine) that use the guild bank money for [...]