What's wrong with my leaves?

About a week ago I started noticing burn marks on my leaves, on the tips and on the edges, straight away I thought it was Nute burn so I drained my pot with 2 Litres of water. Now a week later I am not really noticing any more outright burns but instead I'm starting to see brown speckles on my leaves which seem to be increasing.

Here's a picture

http://s1087.photobucket.com/albums/j479/thecretin14/?action=view&current=scan0010.jpg

Tell me what you think.
 
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