User blog comment:RedPandaPotter/25th Blog and the Writing Update for My Contest - Signing Upping Still in Progress!/@comment-24126795-20120608165802/@comment-4751506-20120610171758

Yup! It's a comma instead of a period. But, as Bloody said, you can put an exlamation mark or a question mark if it's that type of sentence (exclamatory or imperative).