Well, here are the issues I have run into.
1) Gifs load half way and then animate on the base but not on the top.
2) Gifs animate waaaaaaay too fast.
I have found no solution for the 1st issue, and it does not always occur.
As for the second one it has to do with browsers all reading the "0 delay" setting of the animation at uniquee speeds. Most round it to 10/100th of a sec, while Safari loads it at 3/100th resulting in a faster images, but a non-standard speed. Which ***** since I am running animations that follow using a set time out only to have safari throw everything off. I think one other browser runs at something like 6/100ths so Safari is not the only one. Faster could be nice if they all got on the same page, but as they are it is pointless. Pretty much meaning if you want an animated gif you have to avoid the "0 delay setting at all costs, and pretty much anything under 1/10th because it will not display the same in many browsers. It could be this fast speed in Safari that is causing the loading and instability issues with sime.