imagecolorsforindex() Color index 255 out of range in imageapi_gd.module

I have the same error with 6.x-1.6 version.

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Same here on PHP 5.2.10.

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warning: imagecolorsforindex() [function.imagecolorsforindex]: Color index 255 out of range in /home/tit.nl/public_html/drupal6/sites/all/modules/imageapi/imageapi_gd.module on line 251.

ImageAPI 6.x-1.6

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warning: imagecolorsforindex() [function.imagecolorsforindex]: Color index 7 out of range in /home/zzz/htdocs/sites/all/modules/imageapi/imageapi_gd.module on line 251.

ImageAPI 6.x-1.6

this warning come when i create new image advertisement (module ad) *.GIF

I encountered the same error with 5.x-1.5:

imagecolorsforindex() [<a href='function.imagecolorsforindex'>function.imagecolorsforindex</a>]: Color index 255 out of range in C:\Apache2\htdocs\d5\sites\all\modules\imageapi\imageapi_gd.module on line 251.

I was using imagecache to display images from a view, but it turns out those images didn't exist in my local files directory. When I pulled them in, the error disappeared, so not sure if this is a bug or not.