WordPress shows me the following error:
Allowed memory size of x bytes exhausted on line 4 of plugin.php
After I have taken a look into plugin.php, i decided to remove nearly every single installed plugin - which all work together without any problem - to get the shared items plugin running, but it doesn't.
I as many others work on shared hosting environment, which makes it mostly impossible to get around this problem, my provider hopefully will do it for me, but you should try to remove the 400k simplepie to get it work everywhere.