I stumbled upon a strange problem with Google Analytics tagging and Campaign Monitor.
I retrieve my newsletter from the web and check the checkbox that I'd like to track all the links with Google Analytics. Now every time I click a link I get a blank page with the message Invalid GET data and nothing else.
The links I'm tagging are formed like http://www.mysite.com and http://www.mysite.com/section/
The site I'm linking to is made with ExpressionEngine.
Does anyone else have this problem?
Sounds like EE is being a little greedy with the links and assuming it's the one who needs to parse the GA tags. I've seen this before with some CMS'.
If you feel comfortable posting your links here (I'd need the complete urls, with the GA tags and campaign in question) to help you further but I'd recommend shooting an email off to support and we can take care of you there.