Originally Posted by BreezyBrew
Doubt you will have off flavors. Your beer will just be thin and somewhat harsh.
I doubt it. What was your OG? If it was above 1.060 or if you didn't rehydrate the yeast, you probably didn't over pitch by much (if at all).
About the only practical way in a homebrew setting to create problems with a really bad over pitch is to dump a batch of low-mid gravity wort onto an entire fresh yeast cake.
Is the 68*F beer temp or air? If beer, you're OK (although 64-65 for the first few days would be preferable). If that's the air temp, you're running it too warm and you may see some unwanted flavors from that.