Santorum said his statements are not contradictory, nor has his position changed.But this is a nice outline:
Rick Santorum on Intelligent Design
"Therefore, intelligent design is a legitimate scientific theory that should be taught in science classes."
- 2002 Washington Times op-ed article
"I'm not comfortable with intelligent design being taught in the science classroom."
- Interview in August on National Public Radio
"I do not believe it should be required teaching."
- Interview yesterday with The Inquirer
"I thought the Thomas More Law Center made a huge mistake in taking this case and in pushing this case to the extent they did."
- from Inquirer interview
Addendum: someone else has noticed this.