SharePoint 2010 Label Error: The Policy Label Configuration is Invalid

I’ve recently been working a lot around Information Management policies including Labels.  A Label Information Management policy allows you to add force Office users to add a label into a document such as Word or Excel. 
A label is composed of text and fields from your associated content type.  The requirement was to have the following format on the label:

• {Protection Level} {Caveat}

After saving this policy, I opened a document of my content type in Word and was presented with the following message":

The Policy Label configuration is invalid.  Contact your Policy Administrator

Well it turns out you can’t format your label with two content type fields on the same line with only blank space characters in between – hopefully this will be improved in the next update…
The following does work as alternatives:

• {Protection Level} – {Caveat} (a character in-between the two fields)
• {Protection Level} \n {Caveat} (note this places the Caveat field on a new line)

Update

Well it turns out you can use the ASCII tab escape character "\t":

• {Protection Level} \t {Caveat}