Right played with this at home, it was faster, but in IE6 it still takes quite a while to download all the 100 plus files on first load or refresh, at least it didnt insist on downloading them everytime the page was submitted, unlike the MOD network which insists on downloading all 100 plus files everytime in IE6. On all other browsers it seems to get these from cache everytime.
I think this is impacted more because the MOD network is heavily used and with IE6 insisting on downloading all these files it takes even ages. Have you tried using IE6 over a dialup link? It used to be fine but now.....
I am more than sure its the way all the files are loading via the load.ashx file, as the old V5.3 images were fine and were cached everytime. You may have sped up the server side, but you have crippled the editor on this network.
So now I have a choice of using V5.3 which has bugs in that are now fixed in V6,
or saying to my users live with it (where we shall get loads of flack)
or looking for another editor of which I know Cutesoft is the best!
Doh!