After latest SyntaxHighlighter plugin update (version 2.3.8), there suddenly appears error window while mouse moving over SyntaxHighlighter code:
Error #2044 & text=Error #2036 Load never comple
The problem is in clipboard.swf file loading as icon (copy to clipboard). There are more people complaining on this error behaviour, and there is a simple fix. Replace this file in your wordpress:
For this one clipboard.swf. And its working nicely again.