When I'm viewing the movie I'm editing, the current time indicator keeps moving past the last frame which is the closing title. Is there a way to stop the CTI line at the last frame? Or do I just have to press the space bar to do this?
Take a look at the gray tabs of the Work Area Bar to make sure that they span all the intended Timeline content.
Then look for leftover slivers or files to the right of the end gray tab of the Work Area Bar.
Press the End Key to see to try to locate the spot which may be causing the problem.
Please take a look at those aspects of your issue. The answer should be there.
If not, we will re-think the matter with more details.
If the CTI is moving past where you think that you Timeline should be ending, it is likely that you have "Orphans" out beyond where you are looking. This article goes into more detail: http://forums.adobe.com/message/2887552#2887552
Along with ATR's directions, you should be able to clean up the Orphans.