Thanks, sure will take your feedback as bug report bugs can be also filed directly in Koffice for this. Can you send me more details what document type did you try to open PPT or ODP and specific version of the office document. This should work for MS for formats PPT 2000, 2003 & PPTx for 2007 and ODP Files.. This is clearly a bug if you are not able to open your file.
$ file Bedstemoedre.pps Bedstemoedre.pps: CDF V2 Document, Little Endian, Os: Windows, Version 6.0, Code page: 1252, Title: Oma\277, Author: RAH, Last Saved By: Bent Mmller, Revision Number: 3, Name of Creating Application: Microsoft Office PowerPoint, Total Editing Time: 25:41, Create Time/Date: Tue Aug 18 22:23:40 2009, Last Saved Time/Date: Mon Nov 30 11:31:32 2009, Number of Words: 60