Sorry I missed this. I’ve opened an issue for it on the GitHub repo: https://github.com/iamthechad/syntaxhighlightermt/issues/1
Unfortunately, I don’t know anything about the TinyMCE editor, or how it handles entity codes.
*sigh* I never know what a certain comment engine will eat. I was trying to say that the < should be replaced with & lt; (minus the space)
It looks like you need to replace the single < with its entity value of <. Having < in the code to be highlighted confuses the JavaScript engine.
