Thanks to you both for responding!
I actually clear my browsers' caches regularly as part of keeping the page loading time quick, so that isn't the source of my problem. Though updating the Java thingy helped a lot; it got rid of the mass of picture boxes with red X's in them that wouldn't load, so that's great
, but there are still some pictures that just show up as nothing---no box, nothing to click, and it seems everyone else can see the pictures except me.
I found the solution that worked last time (start->run->regsvr32 /u shimgvw.dll), but I did it this time and nothing happened. Would it matter that the system I used the first time was XP Pro SP2 and this one I'm using now is SP1?