Clicking a source in browser returns 404 when running jQuery UI 1.7.3

I can't seem to reproduce this with the directions you gave. Could you give some more info like the exact steps to reproduce and does it always happen? Be as detailed as possible.

I have the exact same issue.
Here are my steps.
1. add my vimeo source to the source list page
2. add vimeo field to my blog content type via cck
3. Create new blog entry
4. Click Vimeo Browse button (attachment 1)
5. Click my username in the popup. And receive a 404 (attachment 2)
Within the vimeo popup, my account link is as follows:
http://erikandshannon.com/user/2042732/vimeo/0/YTozOntzOjU6InRpdGxlIjtzO...

Also, I am running JQuery UI 1.7.3

I did a little more digging as I was curious if it could have something to do with the jQuery UI version, and sure enough! After trying it on another site where I have 1.6 installed, it worked perfectly. So it seems the issue is when running a newer jQuery UI version.
Unfortunately I cannot rollback to 1.6 as other modules on my site rely on 1.7.3.

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I can reproduce the bug. But for me it has something to do with jquery update.

Its very possible that the module is not compatible with a later version of jQuery as well. There has to be some javascript error or something that is going on. Its obvious that there is a problem, but I need to know if there is any js error being thrown.

I'm also running into the 404 error in the Vimeo browser. FF3+FB is reporting the following JS error on my site:

j is undefined
http://example.com/sites/all/libraries/colorbox/colorbox/jquery.colorbox-min.js?N
Line 4

I've got the ColorBox v1.3.15 library installed, running jQuery 1.7.3 (via jQuery UI). Does this module specifically use ColorBox, or does it look for any lightbox support?

I'm going to dig in myself probably over the weekend to see if I can concoct a patch...

[Note - 'example.com' above replaces the actual internal dev hostname]

I had this problem too, It fixed itself when I disabled the Colorbox module I had installed.

same problem with colorbox, debugging this day