Since upgrading from openSUSE 13.1 to 13.2, the system immediately slows down
and freezes after several hours to a day of uptime. Since this is usually the
result of a memory leak, I waited to catch the process at fault before the
machine went unresponsive. The cause appears to be a root process called
upowerd, part of the upower package.

http://software.opensuse.org/package/upower

The process rests at about 1.1 MB of memory usage, so the leak is sudden and
extreme when it happens. As a workaround, I kill the process immediately after
logging in, which doesn't appear to break anything. Since this is likely an
issue with the application, I suggest either disabling upower or downgrading /
upgrading the version offered in 13.2 to one that doesn't have the problem.
openSUSE 13.1 appears to have version 0.9.23 of upower, whereas 13.2 has
version 0.99.1.