I've recently switched from using vimpulse to evil and have noticed a very strange and annoying behavior.
I will be in command mode and hit the 'i' key, which should put me in insert mode. However, what happens instead is that I stay in command mode and my next keystroke is interpreted in that mode.
If I type slower I usually get the correct behavior, but not always.
Note I am using emacs in a terminal not in X, but I'm on a LAN.
Any ideas?
It turns out that having viper active along side evil was the culprit. After disabling all things viper the lag has disappeared and I can be productive!