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I am using Ubuntu and am getting started using emacs. I noticed that I get this error message every time I open a file with emacs.

$ emacs index_controller.rb 

** (emacs:1966): CRITICAL **: murrine_style_draw_box: assertion `height >= -1' failed

I'm trying to set it up to use with Ruby on Rails development. Not sure if that has anything to do with it. What do I need to do to get rid of this message?

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up vote 1 down vote accepted

This message is from Gtk. Gtk likes to spew out lots of worrisome-looking messages on standard error; many of them are in fact harmless.

There's an Ubuntu bug filed about it.

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good to know, thanks! – Andrew Aug 5 '10 at 3:55

It's not an emacs error it's a theme related error.

Resolving "murrine_style_draw_box: assertion `height >= -1'"

you probably need to modify the gtkrc of the theme which you are using, in order to change the property value below from 0 to 1: GtkRange::trough-under-steppers = 1

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