Not currently, the rig I have now doesn't have anything made or sold by Lippert, but this was my past experience.
The company that made that fifth certainly was buying their frames from somebody, wouldn't be surprised if it was from folks who Lippert owns now. For more "in depth" discussions of Lippert frames there are a couple of quite recent forums.
Another Lippert frame issue - HDT - Escapees Discussion Forum
Yet ANOTHER Lippert Frame Failure - HDT - Escapees Discussion Forum
I posted the topic because what Lippert is doing is actually a good news, somebody at Lippert is "noticing" and reacting. I spent my entire life in product development and manufacturing, large and small companies. I have no doubt that Lippert or the frame building subsidiary they purchased could build outstanding frames. It starts exactly with what they announced, properly training their employees and then have quality control people check on the work going out. And they should do one more thing, fire the idiots in charge of the subsidiary who couldn't think of those two things in the first place and created a public embarrassment about quality of Lippert frames (actually their own) in the marketplace.
From what I have seen the issue with Lippert frames is not the the use of 10" or 12" I-beam frames, the failures are poor welding in general and inadequate design and materials used around the pin box structure under the fifth overhang. Here's an example, although I don't know who made that frame.
There is a lot of stress on that weld where the two tubes come together in the front and the two rear pieces of steel might as well not be there.
Incidentally Lippert acquired their frame building subsidiary Quality Frames (?) in 2002, they had plenty of tome to straighten them out and improve quality.