Originally Posted by: fuzzb0xcould be that your guitar is due for a set up, I normally have my guitars set up once a year as it's not expensive and keeps them in a nice playing condition, I would recommend you do this as you will notice a difference when you have your guitar back

I agree with this; i have a cheap largely unknown brand of guitar that i used to practice the basics on. When first purchased, it was impossible to tune and was outputting all kinds of scratchy/buzzing sounds when the strings were struck. Now it produces a cleaner tuning for each string.

Taking your guitar to a specialist for a set-up isn't a bad idea.