ORYX.Core.Canvas sets an attribute, line-heigth. Most likely, line-height was
intended.
At time of writing, the relevant code can be seen at
http://oryx-editor.googlecode.com/svn/trunk/editor/client/scripts/Core/canvas.js
, line 122:
this.node.setAttributeNS(null, 'line-heigth', 'normal');