Hi,
I had the same problem but it was easily fixed (for me anyway). All I did was put a gamelogic thing as close as I could to it in the editor, gave it a name (e.g. bush1) and put in a script:
_bush = nearestobject [getpos bush1 select 0, getpos bush1 select 1, getpos bush1 select 2];
_bush setdammage 1;
exit;
This should destroy it and flatten it, getting it out of the way.
Hope this helps.