[Zope] Mime type for PNG

In trying to view my site with Opera, I noticed that my PNG images (named with blah_blah_png) are send with a Mime type of image/x-png, not image/png. I can't figure out how to get opera to recognize this as a PNG (it apparently handles PNG with image/png, since it does have it defined). Why does Zope use image/x-png? Can I change this (easily)? Cheers... Bruce -- Bruce Elrick, Ph.D. Saltus Technology Consulting Group Personal: belrick@home.com IBM Certified Specialist Business: belrick@saltus.ab.ca ADSM, AIX Support, RS/6000 SP, HACMP