update for v2.03
While checking the number of queries and query time I found that, when viewing only 320 products in approximately 60 categories, the script would execute over 22000 queries 
(when viewing with "Edit Linked Cats" selected).
But fortunately it's easy to fix 
Open admin/quick_updates.php for editting and:
replace all (2 instances?):
Code:
zen_get_category_tree()
by:
Code:
$quick_updates_category_tree
and after:
Code:
// eof get manufacturers
add:
Code:
// bof get category_tree
$quick_updates_category_tree = zen_get_category_tree();
// eof get category_tree
After these changes the number of queries, and the query time, are reduced over 20x (number of queries from 22335 to 1097) in the formentioned example.
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