no. im not using pop-ups.
i think i may have found the problem. i installed the HTML Enhanced Common Library after i did my CS4 install. i followed the instructions and renamed my CssLayers.htt to old_CssLayers.htt and then installed the new CssLayers.htt in the CS4 Update file that i downloaded. i completed the remaining steps in the installation.
however, i went back and replaced the new CssLayers.htt that i donwloaded with my original CssLayers.htt that i had saved as old_CssLayers.htt and the problem appears to have gone away.
my question now is how do i add the HTML Enhanced Common Library to my current Fireworks CS4 which is 10.0.3.011 ??
problem solved. i was using both libraries after updating the script file when i should only use item from the HTML Enhanced.