I'm using the Linux version of DoomRL 0.9.9.1, running on Debian Lenny 5.0 in an Xterm window.
I had the (good?) fortune to run across two gothic boots. I was wearing my current set because the new ones were on the other side of some lava. My inventory was full, so I dropped my other boots on a square next to the new gothic boots. I picked up the new ones and equipped them, replacing my old ones. This triggered the "Suddenly you feel immobilized. You feel like a fortress!" message that is supposed to happen when you equip gothic boots and gothic armor at the same time. And then I got stuck.
I'm not allowed to move. Switching between the two pairs of boots triggers the "Suddenly you feel immobilized!" message. If I drop a pair and unequip the other pair, I still can't move. If I unequip my armor (blue, bulk modded), I'm still stuck. Unequipping my weapons also does nothing.