Why is a Mylyn plugin version error reported upon updating Tasktop?
If you are running with either the Tasktop application or Plug-ins for Eclipse, both of which depend on a specific version of the Mylyn framework. If you are using the weekly Mylyn builds (not major releases) this can lead to update dependency problems due to Tasktop’s stringent requirement on a specific Mylyn version. The solution is to either use the version of Mylyn needed by Tasktop, or if you are willing to assume the risk of using early access (non-release) builds of both Mylyn and Tasktop, use a early access build of Tasktop corresponding to the weekly Mylyn build.