I've tested a bit more.  I believe it is crashing and rebooting based on the size of the pdf pages scanned ones that is.  I can load a 20mb 800page text fine but the 1.5mb 20page ones are causing the hiccup.

Agreed @ the White Screen Issues.  I tried to reproduce it after a reboot by loading a 14mb pdf and several 3mb pdfs and scrolling through fifteen pages of each but I could not.   I got bored at that point. Does nPDF only queue the next page?  I am not familiar with pdfs as a file structure.  When it happened a week ago I had not rebooted for a month so i do not know what remnant may have been lingering. 

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An another note, just found out that those with Ndless 3.9 are not able to reboot their gonkulators w/o a 5v powered micro usb.  Is that in low power or hight power mode?  like a wall wart or a computer?  That sucks!   

Edit Sorunome: Merged double-posts

Bahaha...indeed, I relied on for one today for old content that did not think would be covered but was heavily...pages blanking out and too much memory use...Should have put the things on my cheat sheet.  Live and learn.