On 26 Nov 2008, at 17:38, Jon Evans wrote:
[...] Unfortunately when I right-click the files in the project drawer (all of them, not just the two that won't edit in TextMate) the Treat File as Text/Binary option is disabled.
Files without extension cannot be set to binary nor text. Instead a heuristic is used to decide if they are text, which is effectively if the first 1024 bytes are valid UTF-8 or alternatively, if the file creator is TxMt or (I think) type is text. The latter two things can be set with the SetFile shell command.