Slow motion bug :/

[Danny]

Ever since I updated to 1.6.6, I get this bug where my game starts moving in slow motion. It happens all the time, and lasts for ages.

Broken down, what happens is I walk slower, jump slower and things take longer to mine - even with the proper tool. I haven't accidently hit F8 or something like that, and I've tried various different graphics settings ingame. There's no FPS drop either, everything just moves slower.

I never had this problem with 1.5, it only started after the last update...
Posted this on the MC forums but I only got one (wrong) response. Anyone here have any ideas?

[Rien]

is your system time set right?

[Bloodst3r]

This happens to me too, don't ask me how but it gets fixed straight away if I press left CTRL or left shift button.

[Danny]

is your system time set right?

Yep.

This happens to me too, don't ask me how but it gets fixed straight away if I press left CTRL or left shift button.

Alright thanks, I'll check it out next time.

[Revelator]

would be kinda fun, arrows with slowmotion effects....
*arrow comes nearby a friend* "Noooooo, slowmotion run to stop the arrow"

[Danny]

Yeah, but it's mainly just a pain in the arse.

@Bloodster, it didn't help, the game is still moving in slow motion.

This is such a pain, I've reinstalled the game twice, I don't know what do to >_>