[Motorola Droid RAZR] Ohmster:
Yes it is confirmed. The last known good, stable, no issues rom was build 09/21.

Well, cm11 is a full fledged, all the bells and whistles operating system for Android devices. Because it is a grand plan and requires the work of hundreds of unpaid, open source developers, all working on individual parts of it that must come together in concert and work perfectly, it takes a long time to complete development on a system like CyanogenMod Rom # 11. How many years did it take to produce Windows XP? Windows 7? Windows 8? or each new release of iOS for the Mac? As of yet, cm11 has not even reached "stable" release. Only nightly builds, experimental, and snapshots. Nothing officially "Release" as in release, release candidate, stable, or final. It is "beta software" as of now. The nightly builds come almost every night. Some are good, many are flawed. But this is how a development process works. The developers learn from the bad builds on what was overlooked, what was left out, what we didn't get to yet, what module does not play nice with the other modules?

There are two fairly recent nightly builds that I can personally say are "good, solid, day to day builds". You can find them in the links provided below. They would be build 09/10 and 09/21. Download links have been provided for both of these roms. I put up 09/10 and 09/21 is still on the servers. Install either of those nightly builds with a nice set of pa-gapps on a clean slot and you are good to go, man. I just did that and have no errors to speak of on my phone. I keep a backup of a good build like 09/10 and try some of the new nightlies with the OTA update method. If the rom is a dud, I restore my keeper, 09/10. I just got word that 09/21 is good, I updated to it, and it really is all that and a bag of chips. I already backed it up in Safe Strap and will revert to it when my next update has issues.

Most of us in here do not update "blindly". We have a system of testers which can be anyone who installs the build and reports to the group how it works. Any problems with it? Black screens, signal loss, orange icons, FCs, APN loss, laggy, or anything they find wrong and report the install, the build date, and how it works. Good, bad, and what the issues are. Then the rest of us give thanks and stay away from that update. We all do that, I do it myself and when the new update is "not so good", I restore my Safe Strap backup in ten minutes and I am good to go. :)

There are other roms reported to be very good. Paranoid Android and Liquid Smooth are often mentioned, as well as Slim Kat and AKOP. They are fast and smooth for the most part. But they lack the detailed features being rolled out in cm11. But not everybody needs or wants all these features. They want a phone that works, offers all the basic smart phone services, and that's it. And for those individuals, there are other, better suited roms for that. It is a matter of choice. If you want cm11 to work and work well, then follow the detailed instructions I have recently given with download links. Then pay attention to the build reports and do not install bad roms. You can always ask, "Can anyone recommend a good, stable cm rom build for me?" and any of us will gladly offer you the advice we have.

If you want a good, solid working cm11 phone, then follow the instructions I wrote here.

Ohmster cm11 Tutorial Post #6000​

If you need detailed how to instructions on how to install on a totally clean and wiped phone (And how to wipe it clean), another tutorial I did is posted here.

Ohmster cm11 Tutorial from Scratch Post #6002​

If you just plain had it with cm11 and want something else, like I said, PA & LS are reported to be very good. Be a good member and let us know how it went. We share advice here. Best of luck to you. :D