Have the same issue over here.
It seams that wordpress 3.8.1 has some problems running on php5.2
I currently use this entry in my .htaccess: AddHandler php53-cgi .php
to virtually run on php5.3 but still receive the “http error” issue when I try to upload any pictures.
But according to my webhoster it might still cause some trouble, so they going to transfer my account to a new web server with native php5.4 installed.
keep you posted if this helps.
cheers,
J
