If I copy a section of text from Chrome (also Safari, TextEdit, etc.) and look at what is in the clipboard the types listed (this example is for Chrome) are:
( "public.utf8-plain-text", NSStringPboardType, "public.html", "Apple HTML pasteboard type" )
But then—and this is twisted—just bring TextMate to the front and immediately go back to your original application — and now the types are:
( "dyn.ah62d4rv4gu8y82ppnvw1u7crqf4gnydcr7u1e3cytf2gn", OakTextMatePboardType, "public.utf8-plain-text", NSStringPboardType )
OakTextMatePboardType is proprietary TextMate type. The upshot of this is that the html content of the pasteboard is gone, as is any formatting that an application might derive from the html.
TextMate has something called a clipboard manager; do I need to find it and disable it?
TextMate Version 1.5.10 (1631) OSX 10.7.5