Not really, every time I learn a new word I make sure that I'm pronouncing it correctly. I do this to the point where my past English teachers have told me to stop worrying so much (however, being a major English buff, I can't help it). The weird thing is I'm usually always correct on my pronunciation of words, but this might be because I was taught to spell words by sounding them out, so that enabled me to pronounce them after I had spelled them.