Though 2.5 may have had what felt like a rushed lifetime, in many ways it leaves behind its own legacy. It helped the project to demonstrate its ability to grow quickly and produce a stable product along the way, and in many ways has served as an effective bridge between two releases which will have truly lengthy lifetimes with focuses on long term support and stability.
If you are running an earlier release of the current version (for example, you are running 2.5.1 and the current version is 2.5.6), you should upgrade to the current version. Each minor release fixes a number of bugs and/or security issues. It is always good practice to upgrade to the latest maintenance version as a first step in troubleshooting a problem and fixing any newly discovered security issues.
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