It's not in precise.
$ rmadison diff-ext diff-ext | 0.2.3-3ubuntu1 | hardy/universe | source, amd64, hppa, i386, ia64, lpia, powerpc, sparc diff-ext | 0.3.2-1 | lucid/universe | source, amd64, armel, i386, ia64, powerpc, sparc diff-ext | 0.3.2-1 | maverick/universe | source, amd64, armel, i386, powerpc diff-ext | 0.3.2-1 | natty/universe | source, amd64, armel, i386, powerpc
It's not in precise.
$ rmadison diff-ext
diff-ext | 0.2.3-3ubuntu1 | hardy/universe | source, amd64, hppa, i386, ia64, lpia, powerpc, sparc
diff-ext | 0.3.2-1 | lucid/universe | source, amd64, armel, i386, ia64, powerpc, sparc
diff-ext | 0.3.2-1 | maverick/universe | source, amd64, armel, i386, powerpc
diff-ext | 0.3.2-1 | natty/universe | source, amd64, armel, i386, powerpc