A tip all graduate students and others writing papers out there!
It is always a good idea to have correct grammar and spelling in papers. For some strange reason it increases the acceptance rate ;-)
When working with Latex it is very simple to spell check your files. Just run 'ispell *.tex'. Grammar is harder but what I do is to open the file in MS Word and let it use its grammar check mechanism to tell me what is wrong.
I strongly urge all that submit papers to do this!!