Wrong color with html_mail.pl

Hi.

For some customers, we use the html_mail.pl script from Xymonton. But we have problems with the background color being wrong quite often. The subject and icons are correct, but sometimes the background color is, for example, clear or blue when it should be red. Is anyone else using this script and experiencing the same problem? Do you know what the cause might be? I'm no perl guru, but I cannot find any problems in the script.

Regards,
Johan Sjöberg