The server has just been updated to 1.6.4 and I've noticed a few glitches, some of them might just be my computer cause my computer sucks, but most of them I think are glitches with the server:
1. Wooden doors close as soon as you open them
2. When you select an item in your hot bar it goes straight to the top of your inventory
3. Cant speak
4. Cant open chests
5. cant place blocks
These are the only ones I've noticed so far.