CTD when besieging central European "defenders"

[Apgad]

Playing as Sweboz on Alex, I got a recurring CTD when being attacked by Rhesus in (I think) Silengolamdan (sp?).

I had built a fort just inside his lands, and was duly attacked the next turn. I retreated, and he occupied my fort. Then I beseiged him with a separate army, and went after the settlement with my main attack fort. But when I ended the turn the CTD would always occur when the Eleuthoroi symbol came up.

I wondered if might have to do with Rhesus sallying out to attack, so I tried reloading and not activating the background script straight away. This seemed to work. He attacked my army, I withdrew that stack, and attacked with the other. Script re-activated, CTD avoided, now I've just got a full stack of silver-chevroned evil men waiting for me...

Anyway, I'm not sure if this would happen with other central European provinces with their own elite "defenders of" (Satres etc), but thought I'd bring it up anyway. I'm also not sure if this would be a bug worth investigating and fixing, since it probably wouldn't happen too often, and is (apparently) easy to get around by not activating the script. But even still, I thought I'd mention it.

Anyone else seen/tried this?

BTW, EB1.1, Alex, all permanent fixes applied, all temp fixes tried.