Hidden components re-appearing

Hello,

Just upgraded to SW2011 Sp2.0 and when working with assemblies we keep seeing hidden components re-appearing randomly. They are still hidden in the feature tree. Sometimes rebuild clears it sometimes not. Sometimes the hidden components have to be set to "shown" then set to "hidden" again, but it's only a temp fix.

Just wondering if anybody else is seeing this?

Dave

SolidworksAssemblies