If you go to for example hudson/myJob/build/100, and for that build the svn info of the directory it updates is:

Revision: 43187
Node Kind: directory
Schedule: normal
Last Changed Author: merge
Last Changed Rev: 43183

then the build page will show "Revision: 43183" which is VERY deceptive since SVN disagrees, because in the SVN info, "Revision" exists as a property and is newer. It should at least say "Last Changed Rev" if this is the revision it is displaying. Otherwise trying to figure out which changes were built can be very confusing.

It is also confusing because while Hudson shows the last changed rev, it lists no changes on the build page:

Revision: 43183
No changes.

I think the ideal solution would be to list both the Revision and Last Changed Revision when they are different, and make it clear that the "Changes" are based on the "Revision" and not "Last Changed Revision".