I have just completed my second install.
Installs mostly went smoothly.
Here are the “issues” that I ran into:
Cosmetic:
There were places during the install where it was still saying “Beta”. That should not be there on a release candidate (probably an oversight).
During the install, it downloaded “kaddressbook5”. I suspect that was a mistake.
In more detail, this was after the software install, when it was setting up the newly installed system. The last package actually installed before the finishing steps was “kaddressbook5”. But the later message about downloading “kaddressbook5” is probably bogus. I’m guessing that it was re-using a message buffer that wasn’t properly updated. It was probably downloading something to test the network. Traditionally, this has been the release-notes. It seems unlikely that it would download “kaddressbook5” for that. I’ve seen this also in earlier Beta releases. I wasn’t paying enough attention with Alpha releases.
So those are the cosmetic issues. I haven’t decided on whether to file a bug report.
Functional:
One functional issue. My first install was to a box with Nvidia graphics, using the nouveau driver. Plasma 5 does not much like nouveau. So it is not much of a surprise that it wasn’t perfect.
I set LIBGL_ALWAYS_SOFTWARE=1 in the environment before starting plasma 5. I actually did this with a line in the shell startup file.
Plasma 5 came up nicely, without any problems that I could see.
So I removed the environment definition (commented out) from shell startup file, and logged out and then logged in again. And plasmashell apparently crashed leaving a crippled session and a coredump process. I aborted the session (with CTRL-ALT-BACKSPACE twice), then added back that environment definition. And it has been fine that way.
I have not yet come across any other functional issues.
I should add that both installs were to encrypted LVM. That worked well. For the second of those, I did not use a separate “/boot”, so I had to give grub the encryption key. That also worked well. So all looks good for now, apart from the issues mentioned above.