One of my characters can suddenly only move less than half of her normal distance during a combat round. It is consistent over 6 or 8 battles now. She is not encumbered. Dunno why it should matter, but she's a paladin. Also she has not fallen.

It has become difficult to use her in battle because she can hardly reach the foes in time to have an impact.

Can anybody think why this would happen?

I don't know, but if you are using the Circle of 8 modpack, apparently there is an NPC who will remove effects from your characters (by killing and reviving the character) for you; maybe try that?

(If you're not using that modpack, then you might have some difficulty; killing and reviving the character might work, however, though you may lose XP doing so.)

Thank you! Jaroo fixed it right up.