Glitch needs to be patched.

[YangusTheGreat]

I found that if you disconnect and then reconnect you are teleported directly above of where you disconnected from if there is a low ceiling.
If greifers discover this, it could be quite the problem, so please fix this before too many people discover it!

[DeeKay]

Moved to SMP Support.
This has been a glitch in Minecraft for a while now, nothing Optical can fix.

so please fix this before too many people discover it!

If you don't want people to discover it, then why did you post about it?

[clawstrider]

This is a well known and widely used glitch (Just about every knows it), which Optical cannot patch, that's Mojang's job.

EDIT: Ninjad by DK ^^