I was receiving feed updates from simplechurch.eu via Google Reader. Whenever I clicked on the title of the post, I would find myself staring at a white page with the text:
Invalid GET Data
While the feed was generated by an ExpressionEngine RSS template file, and combined with other feeds using Yahoo! Pipes, the distribution of the feed was being handled by Feedburner.

So I searched around a little and found this quick solution to this problem. Here’s how I fixed it, step by step:

1. Log into your Feedburner Account
2. Click on the feed you wish to fix
3. On the first page (Analyze) click Configure Stats
4. Beneath Track Clicks As A Traffic Source In Google Analytics click Customize…
5. In the box labeled Campaign you should see: Feed: ${feedUri} (${feedName})
6. Remove the round brackets, so that it reads: Feed: ${feedUri} ${feedName}
7. Click Close and then Save. Your feed should now work.