On Jul 30, 5:48 ¨Âí¬ ÂòõîÓïõó¼âòçóï®®®Àçíáéì®ãïí¾ ÷òïôåº > What differs those binaries ones from a installed (from one-click) ruby > ? The ones installed from former One-Click are built using Microsoft Visual C 6.0, that defines the Ruby platform as i386-mswin32. The new ones are built with MinGW (GCC) and the platform is i386- mingw32 Both remains binary compatible because they link to the exact same C Runtime library (MSVCRT.DLL) but sometimes the gems compiled or built against VC6 will not work on MinGW, or viceversa. http://blog.mmediasys.com/2008/08/10/rubygems-with-power-comes-responsibility/ The new shape of installer and the reason for be that way is better explained and covered here: http://wiki.github.com/oneclick/rubyinstaller/faq I made this announcement a few weeks ago: http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/c38255aacd68d6dc But you can search for all my answers at google groups (just search for Ruby Installer) Hope all this information helps. -- Luis Lavena