preferuji tu cachujici variantu protoze: jde se vracet zpet bez "platnost stranky vyprsela", pri navratu zpet zustava vyplneny obsah formularu, podle RFC 2616 je tohle zadouci chovani (In particular history mechanisms SHOULD NOT try to show a semantically transparent view of the current state of a resource. Rather, a history mechanism is meant to show exactly what the user saw at the time when the resource was retrieved.)
nastesti to ma jednoduchy workaround, tak bych to dal asi neresil