When I updated to eclipse 3.2 I found a new irritating feature:

The problem:

The first time when selecting the Run As-> Ant build… on any of the ant tasks (targets) you have in your build.xml file, you get a window called “modify attributes and launch.”

After that any time you try to run an ant task (with or without the build…) you get an annoying “Ant Configuration Selection” window that makes the ant running process a click longer.

The solution:

From the top menu select run->External Tools-> External Tools… which will bring you to “create, manage, and run configurations” window, there delete all the pre-defined tasks under ant build (on the left bar of the window) and click “close”…

I found this workaround here: http://dev.eclipse.org/newslists/news.eclipse.platform/msg20976.html

I hope eclipse will provide a different mechanism that will work around this problem in their next release.