It is so helpful having this support forum. I just updated an old blog of mine to 3.0.5 from 2.9.2 and got an internal system error 500. After initial panic and rechecking files and permissions found advice about adding
AddType x-mapp-php5 .php
to .htaccess and voila the site is working again!
Thankyou
I have had the same problem on one of my sites, comments were closed, and thanks to letheos’ contribution I have fixed the problem, I had automatic comments close after 14 days ticked in the discussion box (duh) never noticed it in all the time I was looking!
As I said thanks, now comments box appearing as wanted!