Valve Releases New Steam Update with Another Ubuntu 14.04 LTS Fix
Between stable builds, the developers launch a large number of Beta versions that integrate a lot of new features. The previous update for this branch was a really small one, but now a more important version has been released, prompting users to upgrade the application.
Most of the time, the Steam client is pretty stable and users don't usually encounter any problems with it, either about performance or stability. This doesn't mean that the software is perfect, because there still are instances where some features or options might not work as expected.