With our house with rounded corners the baseboards also had a groove. Rather than use a rounded baseboard, the carpenters cut a small piece of it with a 45 degree angle to make the transition. It looked great and it wasn't something that drew attention to itself in the way that something that sticks up would have. This also eliminated any groove problems.

Oh yes, he will cut it to the same height for sure. Thanks @palimpsest! I'm sure he can cut the groove, but I think we have like 15 corners, plus these round things are $$! They're $6! Each! Seemed like a lot to me. Writing it down though I feel cheap ;)

@schicksal- that's what we had previously, and I thought it was fine. These are much taller and thicker baseboards than what we had, so I'm wondering if that would maybe look not as polished.

So yes, the carpenter will cut the round corner so it is the same height as the baseboard.

Aside from the groove, the top of the round corner piece does not appear to have the same profile as the top of baseboard. I prefer the angled baseboard pieces to cover the corners.

@javachik- they are both 1/2 inch. Thank you for your opinion!

I have some of these rounded corners in my house. As I've redone flooring in my house I've had the original short baseboards replaced with 5" from HD. I can't tell if they just cut a little corner/transition piece from the main boards or bought a special piece just for that. I suspect the former. It looks good.

we have rounded corners and angled 8" baseboards... I think I prefer that over what I see in your pictures of the rounded... but rounded drywall corners are new to me and I haven't seen or had them anywhere else before so have very limited experience with them, but... if I went with rounded baseboards I think I would have him cut them to size AND put in the groove.

@Linelle and @busybee3, any pics you have and are able to share? It would be appreciated! Thanks!

I think I have seen specific shaped matching radius corners for stock molding profiles. The one you have is generic and works with any profile of the same or less height, but it doesn't give that seamless appearance. Here's a shop that makes them:
http://www.cornerblockstore.com/site_map.htm
Casey

So he says he can router them and make v grooves at the joints and now he's suggesting plinth blocks. Thanks all!

Every corner in our house is rounded, over 80 of them. We have right-angled base boards and crownmolding. Looks nice IMHO and not odd. A couple of pictures below to illustrate.

Thanks @nutsaboutplants, looks gorgeous!

Square looks fine, especially if the void at the top is filled in, but since you found something that follows the radius and your contractor can match the blanks to the rest of your base relatively easily, I think that will look really "custom".

Thanks @palimpset! He is going to trial it out with us, and do some plinth blocks too I think! So I think it'll flow pretty good with the simplicity of the accent pieces. We're getting headers too so the plinths could help to balance that out. Very excited now!

akl_vdb, here ya go. I guess the corner piece is curved.

Thanks Linelle! It does look like a corner piece!

nutsaboutplants, is that a water fountain in your hall?

i haven't posted photos here... it sounded like (from others) it was more difficult to do with photobucket than before- it used to be so easy! -- later, if I try to figure out how, I will post a close up...

Thanks busybee3. If it's too much work, don't worry about it! I have found that sometimes it will let me post pics from my computer, sometimes it won't. A lot of time I post on my computer then take the pics on my phone and it's different than it was before.

I did speak with the carpenter and he's going to try some stuff out to see how we like it. I think it will all work out with the rounded corner without the groove as it'll tie in with the simple plinth blocks now.

Thank you all!

Pudgeder yes, that's a water fountain. We thought about removing it when we bought the house, but it was kinda cool and unusual, so we left it in. Little kids that visit love it. Sorry, didn't mean to distract akl's focus here. Hope she finds the tight solution.

No problem nutsaboutplants! With a water fountain in the hallway that totally deserves distraction!

The rounded corner pieces in my Spanish style house have a profile that exactly matches that of the baseboard. I wouldn't accept any other option.

If anyone is building -- do not do rounded corners for drywall, baseboards, windows, doors, etc. It just adds a level of complexity to basic things like painting. We bought the house with them, but I really hate them! When we added a guest house, I told the contractor I wanted simple easy 90 degree corners and beefy trim around windows and doors ... and no rounded sheetrock anywhere.

Good point, I forgot about how fun painting was at our place in TX between the rounded corners and the heavy knockdown texture that was popular from the early '90s-today(?).

Rounded corners are such a pain with painting! Where do you stop?! Just keep going and going....thank you 1995!