On linux mint 6, using opera 10 the pointer in the kanji drawing window acts really wonky. It lags way behind the mouse cursor position. In firefox 3 it works perfectly though. I'm not sure what information you need to trouble shoot this or if this is just something with opera browser.
On another note it works great in arch linux on firefox and chromium. I'll test it on opera 10 in arch later and see if it has the same problem.
I'm in Oberlin if you want to see my computer.