Here's something new in our application. If you start a browser and open a page, then push an ajax button on that page, the post will fail with a 404. This will continue until you reload the page. Then ajax works on all pages normally. To make it recur, restart the browser. Something to do with HTTPS, maybe? Firefox 5 and Safari 5.0.3 on Mac.
GET
https://192.168.128.204:8443/um/indexServer: Apache-Coyote/1.1
Pragma: No-cache, no-cache
Cache-Control: no-cache, no-cache, private, no-store
Expires: Sat, 30 Jul 2011 05:30:43 UTC
Set-Cookie: JSESSIONID=477B8541866974CE28568738BFA78F1A; Path=/um/; Secure; HttpOnly
Date: Sat, 30 Jul 2011 05:30:43 GMT
X-Lift-Version: 2.4-M2
Content-Type: application/xhtml+xml;charset=utf-8
Content-Length: 3195
POST
https://192.168.128.204:8443/um/ajax_request/F5449275634392VCSCD/Server: Apache-Coyote/1.1
Content-Type: text/html;charset=utf-8
Content-Length: 1063
Date: Sat, 30 Jul 2011 05:30:55 GMT
type Status report
message /um/ajax_request/F5449275634392VCSCD/
description The requested resource (/um/ajax_request/F5449275634392VCSCD/) is not available.
Apache Tomcat/7.0.14