What did you do to fix this issue? I am running into something similar with IE 6 only. No issue in FireFox or IE 7. We are using PKI certificates for the site, no Win authentication, and I get that security dialog in IE that says "This page contains both secure and nonsecure items. Do you to display the nonsecure items?" , whenever a user starts typing in the autocomplete field. Once you respond to the dialog, the autocomplete field works fine. but that is unsat. Thinking it had to be the reference to the cf template below, I added the fully qualified path with https, but it didn't have any effect. Do you think the transport.setRequestHeader("connection", "close") issue might be related to this?
$("#addunit_lookup").autocomplete( "qryUnitLookup.cfm", { Jeff > Honestly, the only time I've seen this issue was when I was using HTTP > accidentally when my main page was in HTTPS.