The second "delete" is the [delete operator](http://msdn.microsoft.com/en-us/library/2b2z052x%28v=vs.94%29.aspx) which is supported in MSIE8. For some reason it seems to confuses the `delete` I've changed with this operator instead of it being a symbol name.

I don't know Microsoft Internet Explorer 8 in detail and I'm just happy the fix was this easy and low impact and wanted to share it with you.