Yes. You're trying to Renderer a gif animation out of AE. That option is only there for reasons I don't understand Here's the best thing you can do. Render an uncompressed QuickTime animation codec movie. Drop that movie into Photoshop or Fireworks and make your gif animation there. Either program will do a better job of dithering to 256 colors.
> That option is only there for reasons I don't understand
We agree. We even took it out recently.
We have always recommended the workflow that Rick recommended. Here's the relevant snippet from the Help document:
"To create an animated GIF movie, first render and export a QuickTime movie from After Effects. Then import the QuickTime movie into Photoshop Extended and export the movie to animated GIF using Save For Web & Devices."
thank you. i ve rendered it to avi and then resaved it to gif in imageready.