Reader Can’t Comment

A friend of mine has been having trouble commenting on my blog for the last couple of weeks; here’s her description:

When I enter a comment, the screen changes just as if my comment had registered, except it’s not there. If I try to re-enter the comment in its exact form, I will get a blank white screen that says something to the effect of “Duplicate comment–it looks like you’ve already said that” and it won’t register.

Anyone have any idea what’s going on? I have Akismet running, but she’s not even showing up as spam or as a comment that needs moderation – it’s like the comment vanishes into thin air.