I'm using the PDF-PHP class from ROS to stream a PDF file to the browser. The user fills in a form and clicks a submit button, which opens a second php page, which streams the PDF output to the browser. I'm experiencing some weird behavior on some PCs, however. They will stream the PDF content, but not the values of the variables passed from the form page. It works fine on my PC, but not on others. I can determine no consistency between the various PCs this behavior shows up on, in terms of browser version (most are IE 6, but one was IE 5), or PDF version (it's failed on versions 5, 6, and 7). Anyone ever experience anything like this? Any suggestions?