Problems with time entry note that contains less-than character via API

Hi,

I have a C# client that creates time entries via the API. I'm serializing a time entry object with the following json value:

{"time_entry":{"billable":false,"note":"<Test Note>","hhmm":"00:01","user_id":"1111"}}

For some reason it does not work if the note contains a less-than character. It works fine otherwise.

This used to work a few weeks ago but for some reason it now just save a blank note.

Any idea why?

Thanks

Ryan