Originally Posted by prowler
Embedding external images in signatures has been disabled to prevent over-large pictures from dominating forum threads.
You can still embed an uploaded picture in your signature (maximum size: 320 by 20 pixels or 19.5 KB; whichever is smaller).
I believe this was discussed previously and i think it was decided that EAB would trial external images with the proviso that that weren't abused. Has the feature been abused or was this change made separately to that discussion.