Very good sir. It seems that, despite my proclivity for making my own trouble, nothing I did in this experiment was out of bounds, and the results were not unexpected (if I *could* have done something to enhance my chances of better results, please be specific and I'll try it.) This is indeed a complex pdf - it's an online magazine, with non-white background, columns that stop and start in artsy, irregular fashion, lots of advertising, etc. So, I get that it's a bit more challenging than a simple document that's been ported from Word to pdf format.
That being said, I have a pdf-to-Palm converter that came with my Treo 650 that has converted almost all content of all the issues of this monthly e-magazine, oddities and all. Only the very first issues of the mag had any problem converting, and those issues were mostly word breaks: no lost content, cracked image conversion, whatever.
I find it baffling that I can carry all these converted files on my Treo and none of them on my Sony Reader. How can this be so transparent on one device and so impossible on another? (Only the truly ignorant can ask such questions. Probably the one and only blessing I enjoy in this matter.)