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

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Learn LaTeX easily with newest books:
The LaTeX Beginner's Guide: 2nd edition and perfect for students writing a thesis
The LaTeX Cookbook: 2nd edition full of practical examples for mathematics, physics, chemistry, and more
LaTeX Graphics with TikZ: the first book about TikZ for perfect drawings in your LaTeX thesis
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
Learn LaTeX easily with newest books:
The LaTeX Beginner's Guide: 2nd edition and perfect for students writing a thesis
The LaTeX Cookbook: 2nd edition full of practical examples for mathematics, physics, chemistry, and more
LaTeX Graphics with TikZ: the first book about TikZ for perfect drawings in your LaTeX thesis