Hi Mr Clarke
In all my fiddlin under the hood of iweb I haven't seen or caused your problem to happen - yet. Were you doing anything different at the time it happenned or fiddlin in the domain package or anything like that?
Regards
To add more info, I cleared the Cache in IE on my PC, disabled all Browser addons, turned Security to lowest level, set .Mac as a Trusted site, deleted cookies, you name it. Cannot add comments from my PC running Win XP Home SP2 and IE.