The
HP LP2475 seems to be better, certainly not heard of so many problems.
The LP2475 uses (an earlier revision of) the exact same panel, so it's prone to the exact same issues. The main difference is the U2410 has a through mode for gaming and a 12 bit LUT so it can provide a better simulated sRGB/Adobe mode. So, if that's yer choice, you're better off with the U2410.
The only "real" issues with the U2410 (other than the usual dead pixel risks you get with any monitor) are the current sRGB mode looks grainy on dark images (something which can "probably" be improved in a firmware revision), and the uniformity issues to do with tints on white and grey backgrounds, which is actually related to IPS panel manufacturing (these issues are likely to become more noticeable as the panel sizes increase).
The main solution to the tint issue isn't actually stricter quality control (because they're unlikely to ditch the worst 25% of their panels just to keep us happier) but uniformity controls which allow you to adjust different regions of the screen so that they match. This is a realistic direction for the U2410 to go in because it now contains a LUT, so they just need to add enough features so that it can vary different zones so that they match each other better. This would likely have to be done at the factory, and is basically like the Colorcomp idea used on the more expensive NEC displays. Displays like Eizo already provide similar features too. Personally, the issue is bad enough that I think this should no longer be viewed as an optional "luxury" extra, but a basic requirement for screens in this price range.
The reason it's probably reported more in the U2410's case is more people, who work with things like Photoshop, probably bought the U2410 Vs the HP because of the sRGB mode, and they're more prone than the average consumer when it comes to picking up these faults. Many people won't notice the tint issue unless you point it out to them. Likewise dead pixels. That's why Dell shove out a lot of screens that even their own warranty says shouldn't be regarded as acceptable, because there's enough people willing to put up with the issues (And who'd probably have been far better off buying a TN panel if they're that careless about the images they see).
So if you're picky about sRGB/Adobe mode wait till the next revision. If you're picky about tint - consider much more expensive monitors or join the panel lottery until Dell add uniformity controls. If you're just the average gamer or video viewer then you'll probably be fine with the U2410 even in its current form, but then you'd probably be better off saving yourself money and buying a TN panel perhaps
If I was buying right now, if I'm honest I'd wait to see what happens with these new 27" IPS LED backlit screens Apple are using, and which the Dell 2711 might well use. I think LED backlighting may well reduce (but not totally solve) the tint uniformity issues..