Recently seen on Amazon AWS' "Linux" distribution: mosh would not install because of a broken dependency on libprotobuf. This was a soluble problem, because an installable version of mosh existed in the epel repo, but yum insisted on installing the most recent version from the AWS repo, even though it was broken. The fix is to restrict yum to consider only packages from epel, and ignore all other repos:
yum --disablerepo "*" --enablerepo "epel" install protobuf mosh
Suppose, for instance, you want to remove all i386 packages from an amd64 install:
apt-get remove $(wajig list-installed | grep i386)
Right now the bitcoin market is about one billion US$, which is a very tiny part of global currency markets. Even if the bitcoin market were to increase by an order of magnitude to ten billion dollars, it would STILL be very small by global currency standards. Given bitcoin's many desirable features, I personally expect it (and perhaps some crypto-currency cousins like Ripple) to go much further, which makes taking at least a small position in bitcoin right now almost a no-brainer, as far as I am concerned. I see only two possible existential risks for crypto-currencies:
For anyone who has a US bank account and can get themselves organized to provide the two-factor authentication (trivial with an Android phone) that they demand, Coinbase is a VERY easy way to move US$ in and out of bitcoin.
This is one of the most interesting trades around right now, as it seems to be mostly decoupled from all the regional economic mayhem we call "civilization" these days.