It will have some problems if you use try to use RMagick with RubyGem > 0.9.For instance, if you use drawing primitive methods, simply you will see (no primitives defined):Magick::Draw error message. To deal with this error, it is not very difficult. You just go to your require statement and change form require 'RMagick' to require 'RMagic.rb'. See the difference.
Hope this help.