Way too often after microB has been left open for a little while, specially (but not restricted to) when sites that use JS and/or Flash have been open, it starts to get more and more unresponsive, pretty soon reaching an unusable level, somtimes i get the dialog about a script taking too long to execute (both with microB's own and with scripts on the page) as well as the dialog about the page not responding and somtimes even microB as a whole. Any idea what is going on and how i can fix this?