Pot Odds Question

[12Motion]

I asked this question in the probability section but it doesn't seem like that section gets as much action as this one. So I will ask here as well. I really want to get an answere.

I just have a question about flush draws. If you flop 4 to a flush I know the odds of getting it are 1.86:1 But whats does this mean? If there is $300 in the pot and I flop 4 to the flush and a player bets the pot $300 it's correct for me to call? I am calling 300 to win a pot of 600 thats 2:1 so I am getting correct odds? Doesn't this mean that in limit hold em and pot limit hold em it's ALWAYS correct to call flush draws? Since you can never bet more then the pot?

Also whats are the odds of making a strait if you flop openended?