Hm, I've had a look at the error, and it doesn't look like an IE error, but something to do with Javascript. Oh, and you can't really uninstall IE. (Well, you can, but it's relied upon by the system, far too many cross-dependencies to uninstall it safely.) So, I advise trying to update your Java system. Or maybe you have a blocker, that blocks javascript? The RS Client uses the IE engine. It is basically IE without, well, IE :P That's definitely and IE error, because it seems to throw a wobbly about everything, without giving a proper explanation. Try re-installing IE, and if that doesn't work, try upgrading to IE 8 Beta.