My fav at Newgrounds...
I must have played this game over a hundred times.
But, dammit, I've only 1/2 way through the final level (7).
Yeah, there's the bug where unrelated tiles are highlighted on the hint, but that always means that there is an "internal" combo on the field - don't look for matches on the perimeter..
Really great game - as I say, it's my favorite flash game on Newgrounds.