CAPTCHAs enabled for now

Hey there!

We're experiencing a high frequency of failed bot account signups since around 2 hours or so. They're all using random names with the same pattern and random GMail e-mail addresses.

In an effort to combat this and to prevent GMail from rate-limiting our mail server, I just enabled CAPTCHAs during registration for now.

In case you experience an issue during registration, please e-mail admin

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