I used MikTeX 2.4 and Ipe (the latest version, http://tclab.kaist.ac.kr/ipe/) to generate EPS-Figures and everything worked very well. Then I installed MikTeX 2.6, and IPE stopped working

emes
Ipe cannot currently cope with the PDF output generated by the new version 1.40 of Pdflatex. This version is included in MikTeX 2.6 and in TexLive 2007. Therefore, Ipe does not currently work with MikTeX 2.6 or TexLive 2007. This will be fixed in Ipe 7.0.0