Bloody fuming, come back from holiday to find this... My build thread is 42 pages long, like hell am I fixing that!!
One thing I have just noticed though, is that if I right click on broken imag and go 'open in new tab', then wait for it to load, if I go back to the broken image I originally clicked on, then the image is fixed! Would have to do it for every image though, and who knows how long before they disappear again...