I've recently upgraded to 2.6.3 and I'm using the Thesis theme.
Most of my readers seem to be able to comment, but one or two are reporting getting an error message on some occasions. I don't know the precise wording of the message, only that it has something to do with cookies and (possibly) java. However, the error is not consistent and they are sometimes able to post comments successfully.
Any ideas about how I go about nailing this?