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Hallo you all. I found a strange problem. I create my slides with ConTeXt. Everything was all right before I included pictures in PNG with transparent background. Adobe Reader 8.1.2 under Linux (at least this one) changes colors on every page where such a PNG is included. Xpdf shows it all right. I wonder what could be the reason, and how to solve it. Can you hint me? You can see the behavior here: http://www.econ.muni.cz/~qasar/vyuka/inst/inst-slide01.pdf Notice difference in colors between the 2nd and 3rd page (the 3rd one includes PNG). PNG are created with Gimp. My ConTeXt is ver: 2008.01.28 21:28 MKII pdfTeX is 3.141592-1.40.3 (Web2C 7.5.6) TeXExec is version 6.2.0 All under openSuSE Linux 10.3. When I start TeXExec, I got this warning: /usr/bin/texmfstart:1838: warning: Insecure world writable dir /home/qasar/bin in PATH, mode 040777 /usr/share/texmf/scripts/context/ruby/base/system.rb:16: warning: Insecure world writable dir /home/qasar/bin in PATH, mode 040777 But I guess it has nothing to do with the color problem. Many greetings to all of you, and thanks to those answering me. ;-) Have a nice day. M.K.