Chris Morrison writes:
We started hearing reports midday on Friday that Critter Island had disappeared. It’s now a day later, and Critter Island is still down, along with dozens of other apps we have listed in AppData for developer LOLapps. All redirect to facebook.com.
[…]
Instead, we’ve learned that these suspensions likely relate to worries at Facebook about privacy, specifically relating to sharing data with third-party advertising services. More information is likely to emerge on Monday.
Read more on Inside Social Games.
Update: See the WSJ article, mentioned here, for the likely explanation.
Via @JulesPolonetsky