There is not much in this file but is seems that the parser is complaining about the parentheses.
;set the absolute location path of webroot directory, example:
webroot =C:/Program Files (x86)/Zend/Apache2/htdocs
;set the absolute location path of zend installation directory, example:
amf.production = false
Sorry for the threadomancy but I can confirm that the cause of this error is the parens in the "C:\Program Files (x86)" part of the path. Well, some part of that path, anyway. I uninstalled Zend CE Server from the location it wanted to install in, which is the non-64 bit program files directory (in Windows 7) and instead reinstalled to "C:\Zend." It's worked like a charm since then.