The first package is the Java plugin (the jre package). I upgraded it (using a SlackBuild). Install went fine, and now I have the jre-6u31-x86_64-1.txz package in my system.
The second package is the protobuf package. I have installed the Compiz window manager (using Sourcery) some months ago, but it stopped to work (because it can't find the libprotobuf.so.7, when I tried to use the fusion-icon or ccsm). When I reinstalled all the Compiz packages, the error was gone (and I can use Compiz again).

But now the things get "strange". The Gslapt update icon appeared, telling me that I need to do some updates. Ok. But when I looked for what packages are selected, I saw:
1) jre
Installed version: 6u31-x86_64-1
Latest version available: 6u25-x86_64-1 (???)
2) protobuf
Installed version: 2.4.1-x86_64-2_SBo
Latest version available: 2.3.0-x86_64-1dj (???)
And Gslapt want to "upgrade" my packages... I added them to the exclusion list (in Preferences...), but I'm wondering if every time I use a Sourcery package (or a manual installed package, using upgradepkg) the Gslapt wants to downgrade it (and I have to watch it closely, never trusting in it again???)
So... any advices or thoghts about this strange behavior (bug?)??