Luis,
It is very strange.. The patch was generated against lars-bloger in openacs-5-1-5 tag. You can see the file blog.tcl here
http://cvs.openacs.org/cvs/*checkout*/openacs-4/packages/lars-blogger/www/blog.tcl
and there is a line
if { ![exists_and_not_null max_content_length] }
that you must change to get max_content_length parameter working
