"Time Spent" field label shown as "Time" in Eclipse client

I am having a slight different behavior on the "Time Spent" field, and need to understand why.
I created a new work item type, and I added a "Time Spent" attribute based on "com.ibm.team.workitem.attribute.timespent" ID with type = Duration.
I included this in the editor as well, as field "Time Spent", kind of "Time Spent", and did not added anything to change the label.
When it is displayed in the web client, I see "Time Spent", but on the Eclipse client it is being displayed as "Time" only.
All the other work item types I have on the project are working as expected on both Eclipse and Web. What can be causing this difference?
Thanks,
--Claudia