Custom Content Doesn't Recognize HTML tags

Team WPMU,

I'm trying to format the content in a Custom Content message, specifically to center it, change the text size (use H2), and add a button.

None of these formatting changes are being accepted. Not sure if it is related to the content area in the plugin or to the cache issue or what. I'm assuming it's the content area of the plugin, as the TinyMCE editor has very limited options.

Something here has to give: either improve the native design options or give the user more access to easily design their own.