There have been a couple of wintering warblers posted for ID on one of the Flickr fora recently - both have been Lesser Whitethroats and the latest one looks interesting to me.
My experience of Asian forms is pretty limited and I feel quite out of my depth with them, so apologies in advance if it just looks like a bog standard curruca to you! I think it's the tone of the brown upperparts, the fact that there's quite a bit of brown in the crown (at least on some images) and nape reducing contrast between crown and mantle, and the warm tones of the underparts that are making me hesitate to just label this as a normal Lesser Whitethroat.
Here are the photos:
Taken today (well yesterday as it's just turned midnight) at Forres in Scotland.
What do you think?