I wrestled with this one too, and I think its a known bug, but there is a work around.

Publish your file as you normally would, and now go look at your HTML code that is produced. The sections that say...

PARAM NAME=bgcolor VALUE=#FFFFFF
EMBED src="jpc.swf" quality=high bgcolor=#FFFFFF

may be screwey. You need to input your own hex code for the two lines for it to work properly. For instance, if it originally says #FF2122, you may have to change it. I think what happens is SWISH transposes the numbers so their #FF2122 should really be #2221FF.

Does this make sense?

I've found this with lots of different shades of colors.

Hope this helps...

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JMJ