Wacko, when I first came here I had Internet Explorer and never had problems, although I couldn't see the atachments in posts.
I would recomend getting rid of Internet Explorer, if you are operating on a Macintosh (like me) try Safari, that's what I'm using now and it's been working great. You can download it from the official Apple Computer site I believe.
If you are on a Windows Box I suggest you start praying.
Or you could PM Little_Pikachu (the Admin, also Mod of Misc)
BTW I'm a big horseperson too, (been riding since I was three ;o) how long have you been riding?