The job's changes page (that shows all of the files that changed in subversion
for the job that ran) is missing the crev parameter when you click on the link
for the file. As a result, you always get the head for the file rather than the
actual version that was part of the job.

So, if my project is called SDK and the build number is 25, the view I am
talking about is:
http://localhost:8080/hudson/job/SDK/25/changes

The link that is missing the crev parameter (which should be set to the revision
of the file) something like:

http://localhost:8080/svnwebclient/fileContent.jsp?location=&url=/trunk/JavaClass.java

It should be (to get revision 10 of the file):

http://localhost:8080/svnwebclient/fileContent.jsp?location=&url=/trunk/JavaClass.java&crev=10