I posted this in the Adobe Lightroom forum but I thought I'd try here as well:
I was doing some processing in Lightroom and created a Quick Collection of 20 images to have a look. Then I went to Slideshow to see them. Now: If I click on the 'Play Preview' icon on the bottom left, it cycles through all images and continues when it gets back to the beginning. However, if I press the Play button on the bottom right (beside Export), it only plays the first two slides over and over again. I tried selecting all images in the film strip; same thing. If I click on one image in the middle, say #7, it plays #7 and #8 over and over again.
Using Lightroom 1.3 under XP.