Maven incorrectly advising newer dependency version (3.0.5.RELEASE to 2.5.6, spring)

I just ran

mvn versions:display-dependency-updates

on my project to check for latest version numbers. Here is some of the output:

[INFO] The following dependencies in Dependencies have newer versions:
[INFO]   javax.mail:mail ......................................... 1.4 -> 1.4.4
[INFO]   javax.servlet:servlet-api ................................. 2.4 -> 2.5
[INFO]   junit:junit ............................................. 4.4 -> 4.8.2
[INFO]   org.springframework:spring-context-support .... 3.0.5.RELEASE -> 2.5.6
[INFO]   org.springframework:spring-core ............... 3.0.5.RELEASE -> 2.5.6
[INFO]   org.springframework:spring-webmvc ............. 3.0.5.RELEASE -开发者_开发技巧> 2.5.6

Why would Maven decide that 2.5.6 is a newer version than 3.0.5.RELEASE?

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Cause The spring people decided not to follow the Maven Versioning Schemata.