First Slide Display in Captivate 6 with Auto-Play turned off

I'm running Captivate 6.0.1.240 as part of the TCS4. I've noticed that a feature that used to work in 5 now no longer seems to be working. According to the help, if you turn off auto-play of your published content and don't specify an image to be used, the first slide of your project is supposed to be used:

Define how a project starts and ends 

Select Edit > Preferences > Project > Start And End (Windows) or Adobe Captivate > Preferences > Project > Start And End (Mac OS) and specify the following preferences:

Auto Play

The movie starts playing as soon as it is downloaded. If you want the movie to play only after the user clicks the Play button, deselect this option. You can display an image until the user starts playing the movie. Click Browse (...) to select the image. If you do not select an image, the first slide of the movie is displayed.

This worked fine in Captivate 5 as I used it to show a title card (just a caption textbox), but now it's just showing a blank screen with the play control on it. Anybody seen this behaviour or know if it's fixed in 7? I'm going to try and rig up a test with a trial version of 7 to test before I log it as a bug.