Sometimes "save" doesn't save the document

Question

We've tried to install different versions of Office Tab to various versions of MS Office. The problem presists: when editing the document (Word or Excel), clicking the "save" button sometimes doesn't save the document. But the button looks like being pressed. After removing Office Tab the problem dissapears.

Additional information: the files are on the network drive. I monitor the access to the files, and when this problem occurs there's no access to the files. Means that's not a network or access problem. And, again, everything works okay after removing or disabling Office Tab.

What I haven't tested yet: does it work with the "save as" feature.

Googling doesn't show anything. Is this a known problem? Can it be fixed?

Uneori, „salvare” nu salvează documentul