Cut/paste from code edit panel doesn't work for large (> 1024 characters) source code

[Pointy]

If the code edit panel (i.e., the console "command line" expanded into the multi-line panel) contains text with more than 1024 characters, and the code is all selected and copied to the clipboard, then when pasted the result is a single "-" character.

I've seen this exact same issue at the jsbeautifier.org site, and it seems to be the fault of a (very) outdated syntax highlighter plugin.