[Zope] PCGI and images not displaying

Hello My set up: Linux (X/OS distribution based on RedHat 6.0), Zope 2.1.6 + PCGI + Apache 1.3.9 We have a DTML document that shows an image based on the selection from the user, something like this: <img src="images/<dtml-var card_id>/<dtml-var picture>"> (I snipped all the rest because it's of no interest here). The image is stored as an object in the ZODB. When the user requests that page, sometimes, the image is not returned to the browser. What I see in the log from Apache is a return code 304 (not changed) and a return code 200 in the Z2.log ... Does anyone knows of this? Is there a workaround besides putting the image in the filesystem and serving it as a URL from Zope only? TIA. /B