Don’t forget that an important tool for showing the steps to reproduce a bug is a movie.
You can walk through the steps (and talk through at the same time), recording as you go. The movie can be an attachment to the bug report.
If necessary the movie can be speeded up or slowed down. I had an incorrect popover that disappeared in less than a second. I made a movie for the bug report, and included instructions for navigating to the right spot and running the movie slowly enough to see the popover, and stop the movie if desired.
The tool I’m using (Windows 7) is MS Screen Recorder, which is available for download.