Is Kombucha Tea safe to drink during pregnancy?

I have enjoyed the benefits of Kombucha tea with its live probiotic cultures prior to becoming pregnant (I am 10 weeks along). Is it still safe for me to drink? I've read the main concern with the tea and pregnancy deals mostly with its detoxifying effects. I've eaten preservative-free as much as possible for the last year (mostly seafood, fruits/veggies, and complex grains), so I'm not as worried about that aspect. Are there other concerns I should be aware of?