During group photos at last weekend's wedding, the hotshoe on the camera was noticeably loose. I figured that over time with constant donning and removing of the flash, this might eventually happen.
Unfortunately, the flash failed to fire a number of times, subsequently - failing to trigger the off-camera flash.
Does anyone know how to tighten the hotshoe? There are no obvious screws visible and I'm not about to dabble in the unknown.
The camera technician is in tomorrow, but before I take it in, I thought I'd try posting here before I surrender the 20D body for - who knows how long???
Thanks in advance - Sam

Canon 30D, Sigma 50-500 EX DG HSM. Tamron SP 90mm F/2.8 Di Macro.

