I might have something related after all: After some time, the player becomes incapable of using Distance Strike, even though the weapon description says it has DS. When you query an enemy with the mouse, you do not see its chances to hit you change with a missile weapon.
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This I've fixed. It wasn't that after some time a missile weapon stopped granting its benefit - it was always. Unless you were dual wielding, the game was now disregarding the distance strike ability of any missile weapon. This one's serious enough that I'll have to upload a new version, likely today. I'm running through a game as an Archer, trying to replicate the other bug you mentioned above, though I suspect that's completely unrelated to the most current fix. Still, when this run through's done (and I'll have to play during work, between clients), I'll upload the latest - bug fixes, and some new content, too. Thanks for the heads up on all of this.