User blog:Hogwild94/Trouble commenting on blog posts

I've been having trouble posting comments on blog posts recently; I quite often find my comment rejected when I try to send it, with the message:

'There seems to be a problem with your login session; this action has been canceled as a precaution against session hijacking. Go back to the previous page, reload that page and then try again.'

Doing so doesn't seem to work.

Is anyone else having this problem? And if so, how can I go about fixing it?