In the download page http://ant.apache.org/ivy/ivyde/download.cgi, in the "Update Site" section, 2nd paragraph, you have a phrase
"In order to do it, follow these steps (Note that for Eclipse 3.4 it may defers):"
I am not comfortable with the usage of English in that phrase. There are two abnormal usage in that phrase.
1. "defers" means to delay implementation or action. I think you actually meant "differ".
2. Usage of modal verb: "it may defers" which after correction#1 "it may differs" should be "it may differ". "May" is a modal verb and "differ" its dependent verb. The modal verb does not inflect its dependent verb.
Examples of modal verbs usage, illustrating non-inflection of dependent verb:
ACCEPTABLE: He dares speak in my presence.
UNACCEPTABLE: He dares speaks in my presence.
ACCEPTABLE: He may speak in my presence.
UNACCEPTABLE: He may speaks in my presence.
ACCEPTABLE: His opinion may differ from mine.
UNACCEPTABLE: His opinion may differs from mine.
ACCEPTABLE: GWT does defer binding.
UNACCEPTABLE: GWT does defers binding.