Apple updated iDVD — a component of iLife ‘11 — to version 7.11. The update fixes a slideshow issue when sending slideshows from iPhoto ‘11 to iDVD. There’s also the usual general note in the patch that the update “improves overall stability.”
The update is a 36MB download through Software Update, which you’ll see if you have iLife ‘11 installed. Apple also offers a download through its support site that is a 34.53MB download.