@ strel: I just downloaded the last version 20091207 and felt I should report this, as it has never happened before: extraction of the following files 7zSD.sfx, _SNMsynth.ini, _SNMsynth.cmd and _35SP1_KB963707FIX_NOFFADDONPROPERTY.7z failed with a diagnostic error: Unknown method in (each one of the above given file names)... This happened with WinRAR 3.90 (I have a trial). I tried WinRAR on a few other archives and there were no problems. However, the archive extracted just fine with 7-Zip. I even tested the extracted files for a T-13 add-on of .NET Framework 2.0 SP2 with updates; the creation was successful, so I'm not really sure what happened. Recommendation to all: use 7-Zip, just in case.