I'm using an HP DesignJet 1055cm plotter:
Take any image file (I used a fresh file similar to test.jpg attached)
Place on a layout at 300 dpi
Make a copy of the image at 299 dpi
Plot using the "draft" setting on the plotter and you will get the entire image at 299 dpi, and 1/3 of the image at 300 dpi.
Plot again using the "normal" or "best" settings on the plotter and everything plots properly.
Printing with postscript to any printer (including the 1055cm) produces the proper image, since the plot quality settings are meaningless.
Anybody seen weird behavior like this on their end?
Wes