file uploads fail with memcache installed

[Dmacleo]

been a bit since I messed with memcache so I trying to re-learn some stuff.
using it on single server, its enabled in global_conf file (and apc is NOT listed in global_conf) and its running and working.
the problem I have is file uploads fail. I have not yet found out if its happening at specific filesize and have not found any error logs yet.
remove it from global_conf and it all works fine.
I cannot, yet, find any info on how memcache interacts with file uploads but there has to be something.
anyone have any quick pointers?

system is centos 6.2 64, directadmin, php 5.4.4, apache 2.4.2.

[Dmacleo]

changed the global_conf and the php.ini to memcached / memcached.so and issue seems better.

so far sizes from 22kb to 22mb have worked fine.