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I tried registering a new account today and it failed twice as the CAPTCHA did not appear. Instead all I could see was:
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CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Enter "foo": *
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with the field to enter my response. I was using Mozilla Firefox 2.0.0.6 on OpenSuse Linux 10.3. When I used the Konqueror browser on the same machine the mathematical expression appeared correctly and I was able to register. So it's not a showstopper, unless you're using Firefox.
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