I absolutely LOVE code folding. Unfortunately, it seems many editors mess it up in some way :-( Kate, gedit and Geany (which I suppose is representative for all

I absolutely LOVE code folding. Unfortunately, it seems many editors mess it up in some way :-( Kate, gedit and Geany (which I suppose is representative for all Scintilla-based editors) all expand every code block below the line your editing when you start a string. Really annoying. And sometimes they get confused about where the folding points are, which means you have to reload the file. I just wish there was a good GUI editor on Linux with good folding support :'(