Trying to get IMCE with Filefield Sources working (no Upload button in popup) I've got a clean install of D6.22, CCK, Filefield, ImageField, Filefield Sources and IMCE. No other modules. 

When i go to http://mysite.com/imce it all works perfectly (see screenshot).

But when i try to implement an image field with IMCE as a filefield source, i can click the "browse" link and the IMCE popup comes up, but the only button i get at the top of the popup is "Insert file". No upload, no delete, no resize etc. Here's the screenshot.

I see from the popup's page info that its URL is...
http://mysite.com/filefield/imce/page/field_pics?app=pics|url@edit-field-pics-0-imce-path
(the image field's human name and machine_name are both "pics").
I'm logged in as user-1, and the IMCE user-1 profile is looking good.

Also, there are no javascript errors, and if inspect the popup with Firebug, the upload button is there, but hidden. If I unhide it and click the button, I get the alert "You can not perform this operation". So it seems to be a permissions problem rather than a javascript problem.

I'm sure i've missed something so simple nobody's bothered to mention it in any of the docs. Can someone enlighten me?!
Ah! Like, Filefield Sources no longer lets IMCE do anything except browse your files and select one of them (for security reasons i think). That's what the situation seems to be, though i can't find anywhere that says that explicitly. 

Luckily there's a patch which reinstates the missing functionality...

http://drupal.org/node/877452#comment-4499144

The maintainer of Filefield Sources links to that patch from the module's project page, so it's a recommended patch.

All functioning now :) Can i have my Sunday back now please? 

++Thanks to ufku for providing the patch.