I've experienced this on various websites, forums, etc.. where I'm typing into a text box. (Oddly it's working here just fine).
Since I find it much faster to move the "beam" cursor around with the arrow keys (and CTRL+Arrow key to jump over whole words), I frequently use that instead of the mouse to reposition the cursor, handy if I want to go back a few words and add or change something.
However on many sites, using the arrow keys fails to move the beam, yet the actual input position does change.
For example, I'll press "CRTL+Left Arrow" a few times to jump back three words. On the screen the beam stops flashing but stays put, yet if I start to type the typing starts where the beam should have ended up if it moved properly.
Any suggestions on fixing this would be appreciated.