Jpeg images not shown in Qwebview

Jpeg images not shown in Qwebview

I have a weird situation, Have been using Qt5 Creator with a custom build
Qt5 library, working ok.
The app is using a Qwebview as UI and needs to show remote jpg files
(user's pictures stored on a server) This has always worked, but now it
doesn't work anymore.
I've been playing around with Qt5 libraries because of another issue
(related to snowleopard) and I thought this might be the source of the
problem, so to be sure, I took my wife's macbook and installed a fresh Qt5
install and builded Qt5 from git with sql support. Took my project files
over and... same problem!
When I go into the browser console and hit something like:
window.location.href ="http://www.pathtosomepngfile.png";
then it shows me the png image, but if I do the same with a remote jpg
file, then it shows me the 'image not found' symbol instead.
Any Idea why my Qwebview suddently doesn't shows me jpegs anymore on the
macs running Qt?