"Mark as read" not working, it's NOT the Session ID error

[Benj]

Anyone ever find the solution to this? I am having the same problems on my board. I tried switching back to the default SMF template but it's still happening.

[redone]

Your post was split and modified to improve its chances of getting resolved. Please send me a temp admin account and include your hosting panel info, ftp etc.

Can you confirm the current version of SMF, mods installed and theme you are trying to use?