IANAL, but I think "circumvention" needs to be intentional to qualify under the DMCA. The point of Wine is to have Windows apps behave EXACTLY as they would on Windows. If they don't, it's a bug. It may be a convenient bug to some, but it's a bug and I think it's pretty provable that the bug's existence is unintentional, and that the Wine developers would prefer if the software behaved differently (i.e. exactly like Windows). Where does the fault lie in Wine's inability to 100% perfectly emulate a Windows environment--with Microsoft, interestingly, not with the Wine developers or the Wine users.
Not only that, but case law shows that interoperability is a valid reason to circumvent copyright protection (the "garage door opener" case), so Wine attempting to run Photoshop is not in itself a problem.
It doesn't mean Adobe can't sue anyone, though, it just means they won't likely win in court. Usually this is irrelevant as the cost of winning in court is prohibitive. Such is life in America. Adobe can sue you just for breathing right now. Don't worry about additional things unless a real lawyer (which I am not) advises you that you should be worried.