I just started working with Map 5 (~2002LT). The 'undo'-command seems to be affecting also for the 'zoom'-command, unlike in the previous versions. Is it possible to modify the command (this feature really slows things down).
The Undo commands also undoes Zooms in AutoCAD LT 2000i. You can always undo a number of commands at one go by selecting the down arrow between the undo and redo icons.