Fixed?
I've upgraded to Ubuntu 12.04 Beta-2 (and thank you, Parallels, for adding compatibility even before it is officially released -- VMware could never be bothered to make their stuff compatible with the new version of an OS until a couple months *after* it was released, and on Ubuntu's six-month upgrade cycle, that's just ridiculous).
Anyway, the "flicker" problem is either gone or at least a *lot* less common now. I might have seen it happen once, in the several days that I used 12.04 a few weeks ago (had to go back to an 11.10 VM until Parallels was updated, just returned to 12.04 last night after discovering the latest Parallels upgrade). I used to see it happen regularly when sending e-mail, but I've been sending mail all morning, and it's been completely solid. :-D
I've upgraded to Ubuntu 12.04 Beta-2 (and thank you, Parallels, for adding compatibility even before it is officially released -- VMware could never be bothered to make their stuff compatible with the new version of an OS until a couple months *after* it was released, and on Ubuntu's six-month upgrade cycle, that's just ridiculous).
Anyway, the "flicker" problem is either gone or at least a *lot* less common now. I might have seen it happen once, in the several days that I used 12.04 a few weeks ago (had to go back to an 11.10 VM until Parallels was updated, just returned to 12.04 last night after discovering the latest Parallels upgrade). I used to see it happen regularly when sending e-mail, but I've been sending mail all morning, and it's been completely solid. :-D