Installing Proofing Tools changes the behavior of my taskbar

D

Dato Da

My PC runs Windows XP SP1.

After installing Office XP Proofing Tools, I can no longer
fine-tune the thickness of the taskbar by dragging its
edge with the left mouse button down; there seems to be
several set thicknesses and I have to use one of them.

Does anyone know what to do to regain the fine-tunability?
Thanks.
 
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