No, I'm using Opera (see the log). It's possible Opera is sending such info as well (it uses Google for autocompletion), but I've tried reproducing this and I

No, I'm using Opera (see the log). It's possible Opera is sending such info as well (it uses Google for autocompletion), but I've tried reproducing this and I don't see evidence of it. (I do see autocompletion requests, but never for complete URLs.)