As I said before, I've never seen this in Previewing a report. There is a known issue with printing through a parallel, and Jim Nelson has already pointed you to a thread where you can read up on that... but there is absolutely nothing I can think of or heard of that will cause the slowdown you are seeing with a preview. Is it possible for you to post the code you are using for previewing the report? Also, is it just this report or are there others that are exhibiting the super-sluggish preview when report behavior is set to 90? Also, can you use create a coverage log (coverage profiler) and determine where the bottleneck(s) are?

>Thanks to everyone for their help. I've tried incorporating several of the good suggestions and here is what I get. The report is 11-12 pages long depending on the version. Printer environment is NOT saved, the report has been packed. All times listed below are to PREVIEW. In all cases the same exact code is running. In each case of 9.0, ENGINEBEHAVIOR is set to 70.
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>FOXPRO 7.0: Less than 1 second, no time difference when previewing from page to page.
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>FOXPRO 9.0, reportbehavior = 80: 64 seconds, previewing to the next page takes just as long.
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>FOXPRO 9.0, report behavior = 90, using reportoutput.app and reportpreview.app that come with VFP: 400 seconds
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>Again, the report has no pictures or graphics.