I've created a project in Premiere Pro CS5 (64-bit) on Windows 7 Pro x64. It's 28 minutes long. When I try to render it in Media Encoder CS5 (to YouTube Widescreen HD), it gets about 2/3 of the way through and then stops. It doesn't close, it just freezes. Not always at the same place (I've tried four times). If I click on Stop Queue, it asks if I'm sure and when I say Yes (click on "No," actually), it hangs and Windows presents its "Close the program?" dialog, followed by a dialog saying, "PProHeadless.exe has stropped working" and asking if I want to close that, too. I say yes and return to the desktop. I modified the render to VBR 2-pass from VBR 1-pass, to see if it would at least get through the first pass without hanging, but it didn't.
I've created dozens of projects with these tools, most shorter but some longer, and have never had this problem. Any suggestions? Thanks.