When I type into group or private chat windows in the PvP.net client, it only shows/updated the characters I've typed once a second. It feels a bit like the framerate is really slow, since the yellow pulsing bar under my summoner name is cycling very slowly.

This was after I had tried to create a match but couldn't, (see the firewall error message thread).

I shutdown PvP.net and restarted it, and when I came back the typing and bar pulsing were back to normal speed. I was able to play a match and when I returned to PvP.net the typing and pulsing were still good. Maybe just a weird case where you leave or can't connect to a game.

Thought I'd report it anyhow...

I noticed this error as well. Also the chat game window still very slow. I cannot type normally because there is still that lag which prevents from typing fast ...