Friends,
I have recently noticed couple of issues related to comment posts in the forum and on images. This I guess has happened due to recent upgrade of the hosting server software. If any of you face that issue please leave us a mail or post here (if you can). I hope to attend to that in a few days.
The issue however is not consistent and seem to happen from some client. For example, I have this issue (can't post comment, it logs me out) from my laptop but from my work station it works fine. We need to debug this issue.