@gfrhodes:
mine is twitchy sometimes, too. I think it has to to with the infrared based touchscreen which could act strange when something interferes the beams.
@wannabenerd:
What kind of pdf files did you copy to your reader? I just copy the pdf files via windows explorer to my DPT-S1 and it works. If I can not open a pdf I can not open it on the pc, too.
Do you use files from a Mac and maybe you copied thoses hidden files which look like _name.xxx?
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