[TxMt] TextMate::UI.request_confirmation fails

I am running 2.0-alpha.9507 on OS X 10.9.1.

I first noticed this problem in the rails bundle whenever it requests to create a new file.

I can recreate the issue with the following code:

require '/Users/curt/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb'

TextMate::UI.request_confirmation( :button1 => "Create", :button2 => "Cancel", :title => "Missing foo.rb", :prompt => "Create missing foo.rb?" )

Pressing Cmd-R results in: ArgumentError: An object in the argument tree could not be converted

Here is the stack trace: /Users/curt/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:54:in `to_plist': An object in the argument tree could not be converted (ArgumentError) from /Users/curt/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:54:in `alert' from /Users/curt/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:277:in `request_confirmation'

It is runing ruby version: 2.0.0-p247

Is this a known problem. Or perhaps a problem using Ruby 2.0?