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I have some strange behaviour on Windows XP boxes (the same code on Linux doesn''t have the same behaviour). Ruby 1.8.2 and Rails 0.14.2. I have a single inheritance table nodes with a base class Node (acts_as_tree) and some subclasses such as PageNode and FolderNode. If I render the tree in an iframe in a set of iframes it doesn''t work, if I render it stand alone it works (there are three iframes with different url:s for each, nothing strange). The error is really bizarre. On some of the nodes ruby complains that "children is not a method&qu...