In general the upgrade from 4.6.5 to 4.7.2 should be easy and bring quite some advantages; we're really happy with most of KDE 4.7.2 here. In particular also many quirks of the graphics acceleration have been ironed out.
However, there is one Big Thing happening with the upgrade: While the stable version of the KDE PIM applications (kontact, kmail, korganizer, ...) so far was still 18.104.22.168, we will try to stabilize KDE PIM 4.7.2 now. (Not my idea.) This is a major upgrade with potential for major breakage, especially since many people think that KDE PIM 4.7.2 has not even reached beta quality yet.
Why are we doing this, you may ask? Well, the big problem is, the upstream KDE PIM developers consider version 22.214.171.124 obsolete and unsupported. The first regression has appeared (see Gentoo bug 382411 and KDE bug 279432), and we expect there will be more in the future. We will keep KDE PIM 126.96.36.199 in Gentoo and try to support it as long as we can, but then we're not familiar with the code and cannot do too much on our own if things start to break.
Anyway. If you're brave and want to help us testing, please grab the list attached to the stable request, place it on your Gentoo system into /etc/portage/package.keywords, and upgrade your system.
- If you want to upgrade the rest of KDE but not KDE PIM, grab the corresponding mask file and place it into /etc/portage/package.mask. This means all KDE PIM applications will remain at trusty version 188.8.131.52 until you remove the mask entries again.
- If you want to upgrade the entire KDE including KDE PIM to version 4.7.2, please read the KDE PIM upgrade guide in our new Wiki first. And yes, please feel free to contribute improvements there!