portupgrade while in programs

[paean]

Traditionally, I've always dropped out of my window manager and any other program while running portupgrade, but I'm wondering if that's completely necessary. What potential issues can arise when you run portupgrade -arR and you are running the programs that are being updated?

[Brandybuck]

I've never had any problems with portupgrade going on while I'm working in a desktop environment. The only quirk I've ever seen is icons disappearing from kicker after upgrading an app whose icon is in it. But restarting kicker fixes it.