Block Submit Form Issue

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When I submit a form in my block to an action on my block's controller, the page just goes blank. If I change the name of my form to an invalid action name, it just redisplays the current page. No errors in the logs, no database activity (controller action should be writing a record to the database). Anyone have any idea of what I might be doing wrong?

I can post some code samples if necessary.

joshhawthorne