Letters Lagging

I switched beta versions from the standard beta to the NaNoWiMo, and it seems the program is lagging behind when I type. Meaning, the letters are hesitating just…enough…to…annoy as I type in my notes. Okay, fine, I type 90wpm, but it wasn’t doing this with the last beta, so I’m at a loss.

It’s doing it both on my netbook under XP and on my desktop running Windows 7). It’s not happening in Word or here online.

Irritating weirdness. Is there anything I can try to make the cursor keep up with the letters? Thanks!