I'm trying to make a GIF expression with mathematica, everything went well, and here's my fruit ("DisplayDurations"->0.015):

When played in IE browser, the GIF will be a little strange since the animation is slower than that in Chrome, so I decided to speed it up by modifying "DisplayDurations":
Export["eurika.gif", img, "DisplayDurations" -> 0.01]
But I only got

which is quite slow! After some trial I guess that perhaps any duration smaller than 0.015 will lead to the same error. I've searched the Internet and there seems to be no limit for the frames of GIF, What's wrong? How can I speed up my GIF?
"DisplayDurations" -> 0.01is probably higher than your monitors refresh rate... – Ajasja Nov 12 '12 at 13:00Timingin Mathematica uses this too. (Of course there are faster timers too but I guess that's not what IE uses.) – Szabolcs Nov 12 '12 at 14:48