I am using the beamer class. I had a working installation on Windows XP with MikTeX. After switching to Windows 7 (not my choice...), I get the error below, also with weird looking text between pages.
Package kvsetkeys Error: Undefined key `pdfpageduration'. \end{frame}
(followed by: ) intro.tex /Presentation1 line 19 Texlipse Build Error
This happens with TexLive as well as with MikTeX. The same error repeats for each \end{frame} in the document.