I was just about to post a thread about my experiences with build 10122 and they have not been buttery smooth.
It cannot remember default programs for opening pictures (jpg,gif, etc.). Every time I open a picture Windows asks which program I want to use and even though I tell it to use a specific program every time it still forgets.
The blue screen problems I posted about earlier have gone away and not a problem at the moment.
Yesterday I was getting a lot of random errors and problems and at one point I pressed the button to open my CD drive and it wouldn't open. At the same time the HDD activity light came on solid and not blinking. Opened the case and removed the SATA cable and the drive would then open. Messed around with things and eventually got the CD drive working.
Sleep mode is not functioning at all. Usually the monitor will go into sleep mode even when the CPU doesn't but now both the monitor and the CPU remain on and will not go to sleep. I discovered that if I did not log on after a reboot both the monitor and CPU would go into sleep mode. Logging on caused it to not function. After reboots sleep mode is now a hit or miss thing that works sometimes and sometimes it doesn't. Don't know what is keeping the monitor awake.
This morning I had more problems with Firefox and Windows Live Mail. Newsgroups were acting like there was no internet connection but the connection was active. Tried to open Firefox to double check internet connection and suddenly the screen went black and I started getting the error messages pictured below. I would open Task Manager and it would not show Firefox as an open app even though the error message was indicating it was running. Fiddled around and finally rebooted and now everything is function normally except the default program issue is still there.
Issues are appearing and disappearing randomly and no idea what the causes are.
