Can't say I have, aside from after eating asparagus. What's a typical food day like for you? Are you very low carb (I think being in ketosis causes smelly urine)? What kind of supplements are you taking? This could also be a sign of something that needs to be checked out: http://www.mayoclinic.com/health/urine-odor/MY00378/DSECTION=causes
If you are doing a low carb version of paleo, this is probably from ketones in your urine (ketonuria). Ketones contain acetone - think nail polish remover/paint thinner. I get an overripe fruit smell that tells me I'm spilling ketones. as your metabolism adjusts from burning sugar to fat (your cells will grow mitochondria specific to fat-burning) fewer ketones will spill over into your urine. It could take 6 or more weeks to adapt fully. If the smell really bothers you, add some carbs like sweet potato/yam or even a little white rice. Or just stick it out. (double entendre?)
Are you drinking enough water? Infound that increasing my fat and protein and getting off carbs made me a lot thirstier and my pee a lot more concentrated so I just started drinking more.
I second the answers re: ketosis causing it and drinking more water reducing it. The longer you are in ketosis the more likely it is to subside, and drinking more water should have the same effect.
I've heard that ketosis causes bad breath and smelly urine sometimes. But if it persists without any obvious cause (your diet isn't low enough carb to cause ketosis) I would suggest seeing a doctor just to be safe.
Aside from when I have asparagus or fish, the only time that I notice a strong smell is if I've been eating a lot of coconut flour (not the oil or milk- just the flour). Then it gets a scent sort of like mild asparagus pee. Too much and it affects my breath and arm pits too.