not always...
safari crashes on me <i>constantly</i> and it's insanely aggravating. sometimes my webpages are still there when i open safari again, but most of the time they are not.
safari almost always crashes on me when i click on a link trying to open a new page. when it first started, it happened very rarely, but now i almost hate using safari on my iPhone, because i know it's going to crash at any random second.
another issue i'm having is the ipod app crashing. i'll be listening to music through the headphones, and be browsing safari, and suddenly the music will stop. this has happened to me several times.
i'm so happy with iPhone overall, but these issues are driving me crazy...