I also like to see English written correctly, but as someone earlier in the thread mentioned, the general standard on here is pretty good. Just take a look at the comments on the BFC Facebook page for comparison. Actually on second thoughts, don't. You'll probably start to lose the will to live (and that's before you've even looked at the content).
My android phone changes of to if every time or possibly if to of I can't remember. Either way it's very annoying if I don't notice it at the time
My current boss refers to own goals as "home goals", as in "we don't want to score any home goals". Genuinely baffled the first time he said it.