spook - this is the 2nd time that you've mentioned that the navigation is caching correctly for you. Just so you know, we have made NO modifications since the day it was changed. Nor can we reproduce the issues that any of you are reporting. We've tested in Netscape 4.7x, Netscape 6.x, Netscape 7.x, IE 5.x, IE 6.x, Opera 6.x, Firefox 0.9, Safari, and Mozilla 1.7. The only time we experience caching issues is when we set the browser to download a new version upon every visit to the page. Otherwise, the response times have been quite reasonable to download the images. Anywhere from under 1 second to 18 seconds depending upon whether your connecting at 3mbps or 14.4k respectively to download the navigation. After the initial download, we have had no problems with the navigation caching in each of the browsers tested.