If your gallery is auto-playing before the images have loaded try making them smaller.
Felix - Is this really the only solution? My web host recently moved my site to a slower server and now I am having this same issue. I've already got my images web-optimized and can't shrink them any further. Hell, my entire site, even with 12 AV galleries, is only about 38mb's total. Isn't there some code I can add somewhere to do something like "delay auto-play until pre-load is done?"
p.s. Looking forward to trying out AV Pro 1.4 next time I update my site!