Keep getting 'illegal tag "body"' on iFrame app
I've written tons of basic FB apps, all created as iFrame apps. I tried to install a new one today and all of a sudden, I'm getting this error:
App Temporarily Unavailable Parse errors: FBML Error (line 13): illegal tag "body" under "fb:tab-position"
I'm confused: this is an IFRAME app. Any suggestions?
Solution
Sounds like it's being parsed as FBML - are you sure it's actually an iframe app - for old apps there's a different setting for FBML and iframe modes, accessed via the app's advanced settings - 
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