i am using pdfmod 0.8.3 from the ubuntu PPA. i am trying to open the PDF http://www.stfc.ac.uk/Resources/PDF/Fascination_Newsletter.pdf ( http://www.stfc.ac.uk/News%20and%20Events/Press%20Releases/STFC/18653.aspx ).

i get the following message:
[Debug 14:43:18.985] Starting PdfMod
[Debug 14:43:19.041] Initializing i18n catalog from /usr/share/locale/
[Debug 14:43:19.257] Loaded custom AccelMap from /home/sam/.config/pdfmod/gtk_accel_map
[Debug 14:43:19.342] Cache directory set to /home/sam/.cache/pdfmod
[Warn  14:43:21.334] Caught an exception - Cannot handle iref streams. The current implementation of PDFsharp cannot handle this PDF feature introduced with Acrobat 6. (in `PdfSharp')
  at PdfSharp.Pdf.IO.Parser.ReadXRefTableAndTrailer (PdfSharp.Pdf.PdfReferenceTable xrefTable) [0x00000] 
  at PdfSharp.Pdf.IO.Parser.ReadTrailer () [0x00000] 
  at PdfSharp.Pdf.IO.PdfReader.Open (System.IO.Stream stream, System.String password, PdfDocumentOpenMode openmode, PdfSharp.Pdf.IO.PdfPasswordProvider passwordProvider) [0x00000] 
  at PdfSharp.Pdf.IO.PdfReader.Open (System.String path, System.String password, PdfDocumentOpenMode openmode, PdfSharp.Pdf.IO.PdfPasswordProvider provider) [0x00000] 
  at PdfSharp.Pdf.IO.PdfReader.Open (System.String path, PdfDocumentOpenMode openmode, PdfSharp.Pdf.IO.PdfPasswordProvider provider) [0x00000] 
  at PdfMod.Pdf.Document.Load (System.String uri, PdfSharp.Pdf.IO.PdfPasswordProvider passwordProvider, Boolean isAlreadyTmp) [0x00000] 
  at PdfMod.Gui.Client+<LoadPath>c__AnonStorey6.<>m__8 () [0x00000] 
[Error 14:43:21.339] Error Loading Document - There was an error loading /home/sam/Documents/Fascination_Newsletter.pdf


it displays in evince fine.