Yeah. Also, if your TLD belongs to somewhere with a less than stable government, who knows if they'll just stop caring about you.

And, a portion of your users will always try to go to whatever.com instead of whatev.er, the worst part is you have no idea how many, but the guy that's parked the domain probably does. As you grow your business, traffic to the .com domain will only increase, you'll eventually want to buy it but whoever owns it will know they've got your balls in a vice, and you'll have no idea if it's even worth it (except by their word).

It's fine for certain types of businesses (especially those consumed by machines or the people who love them). Sites with eyes for mass appeal should probably try to come up with a memorable-yet-unique .com.