Not sure if it's because my PowerPDF library sources are old, but apparently there was some changes to lazarus jpeg support?

I had to make the following change to get it to compile:

{$IFDEF LAZ_POWERPDF}
   //LazJPEG <== Old
   JPEGLib // <== New
   {$ELSE}
   Windows, Messages, JPEG
   {$ENDIF}
   ;