After updating from 7.2.1 to 7.2.2 File Management just gives a rotating circle after clicking on the Upload File icon. This does not happen on my localhost, or on a new install on a shared hosting service. However, on a different shared hosting service, two sites on the same server have this problem. First on one, so I tried every check I could think of, but then I upgraded another site to 7.2.2 and it happened to it as well. I have tried adding Digital Asset Management to a new page, but that one exhibits the same problem. Here is the end of a trace of network communications:
URL Protocol Method Result Type Received Taken Initiator Wait Start Request Response Cache read Gap
/Resources/Shared/scripts/initWidgets.js HTTP GET 304 application/javascript 174 B < 1 ms <script> 748 0 0 0 0 1607
/portals/0/Templates/ImageAndTitle.css HTTP GET 304 text/css 158 B < 1 ms @import 748 0 0 0 0 1607
/portals/0/Templates/SimpleTableAndHeader.css HTTP GET 304 text/css 158 B < 1 ms @import 748 0 0 0 0 1607
/portals/0/Templates/TwoColumnAndTitle.css HTTP GET 304 text/css 158 B 16 ms @import 748 16 0 0 0 1591
/portals/_default/skins/_default/webcontrolskin/default/ComboBox.Default.css HTTP GET 304 text/css 161 B < 1 ms @import 795 0 0 0 0 1560
/WebResource.axd?d=T3G90aWMrYMxNJPOxgCPcZV1r9soTB5OcEkVpzrdauGCyhFXjhSnP0yrqmUEA1I6W3kBtbjHmirtoQJaoEJ0VRzyVzchG0R4mZEAPLqIHOOGdb0VOv8sthgFfId3gNr-eVjglqUtAV6sWUrf0&t=635211360620000000 HTTP GET 304 image/png 204 B < 1 ms background-image 1326 0 0 0 0 1029
/Resources/Shared/scripts/DotNetNukeAjaxShared.js?_=1397164989813 HTTP GET 200 application/javascript 10.10 KB 0.74 s XMLHttpRequest 1326 0 733 16 0 280
/Portals/_default/Skins/ForestWalk/images/sheet_h.png HTTP GET 304 image/png 159 B < 1 ms background-image 1450 0 0 0 0 905
/DesktopModules/DigitalAssets/API/ContentService/GetFolderContent HTTP POST 200 application/json 6.07 KB 390 ms XMLHttpRequest 1872 31 172 187 0 93
/images/closeBtn.png HTTP GET 304 image/png 160 B < 1 ms background-image 1981 0 0 0 0 374
/Resources/Shared/scripts/widgets.js?_=1397164989814 HTTP GET 200 application/javascript 11.46 KB 265 ms XMLHttpRequest 2090 16 156 93 0 0
After the last line above, it just sits there and waits with the rotating circle. I have checked jQuery versions, recycled app domain, cleared cache, etc. On other sites running 7.2.1 and earlier, clicking the file upload icon causes an immediate presentation of the 'drop zone'. With these 7.2.2 sites, after clicking the icon, there is a slight pause, then the page appears to refresh with the circle rotating endlessly.