Several bloggers suggesting the problem is template related. Several error messages noted in various foreign languages.
This information will help us to track down your specific problem and
fix it! We apologize for the inconvenience.
Exception trace -- Internal only!
java.lang.StringIndexOutOfBoundsException: String index out of range:
and much more debug information
>> (Update 1/17 18:45): Problem appears resolved.
>> (Update 1/17 17:30) From Blogger Employee:
This error (as well as some others) is coming from a recent change we just released. The errors are transient and we're working on them right now.