2013-07-31, 00:04
Just a SWAG on my part, but try removing the <cachemembuffersize> entry in your advancedsettings.xml, restarting XBMC and retesting your scenario.
If that works, try adding back <cachemembuffersize>, but testing it with various smaller values.
If that works, try adding back <cachemembuffersize>, but testing it with various smaller values.