Our inventory uses the URL field to track things like the filters you have active on the inventory. If you're filtering too precisely, this field can get too long for the server to accept. You can fix this by using a less-well-defined inventory filter when you go to make over these entities.
I know you can encounter this type of error when your request cookies are too large, as a first step, can you try clearing your cookies for the swcombine.com domain (this might cause you to have to login again).
hehe, that offer was very kindly made before, and from that, or at least partly due to that anyway, the range details got added to help with combat.
as it is mainly text bassed, the game is pretty much as accessible as it can get I think, apart from perhaps tweaking tab orders, which would probably be a massive project I cannot think of anything off the top of my head that needs tweaking!
But I will bear in mind your offer if I do come across anything particularly troublesome!