i tab to go from one field to the next..
when its a select list, i either use arrows, or hit the letter or number to reach the right selection.
this happens sometimes and drives me nuts: i fill out the form, almost done, then i make a typo and i'm right about to hit the backspace i accidently hit tab first, which makes me go the next field, which happens to be a select list, and when i hit the backspace it functions like a back button instead.. when i hit forward sometimes the stuff i filled in is gone! argh, that pisses me off..
