Eclispse 3.1 comes with a very usefull feature (at least for me, although I do not like Eclipse too much in general). That is automatic highlighting of variable, parameter, field, method or class references in a file. I found that having to choose an option to enter the highlighting mode in IDEA is an unnecesary step. For users that do not want highlighting of usages, there could be an option to disable them. In Eclipse 3.1 this option is enabled by default, so I suppose more users find it usefull then iritating.