We have some good news and some bad news. We are currently in the process to update all servers to 1.7.9 official bukkit which will take sometime per server due to UUID conversion to save players Inventories, Last Location, EnderChest Contains, etc. So please expect a little delay/servers going down and such which is the bad news but on the other side the good news is, this update could possibly fix lots of connection related issues, random client crashes, random server crashes, etc..
For live updates on what have been done so far, visit HC's change log by clicking here. We are updating the change log as soon as we are done working on something.
Bear with us as we are doing our best to have this done as soon as possible and as always we appreciate your patience and understanding.