Tried NoWait, the problem is much worse. Using 1 s interval, sometimes the pauses are up to 20 s long. The results are random. Using 3 s interval it is a little better, still sometimes 10 s. Using 10 s interval, it is barely noticeable, but still sometimes takes up to 15 s. Instead of looking at the actual results I've learned to read the red light on the camera, after taking 10,000 shots in 20 different locations. Sometimes it works, but usually not!
This issue is making matters worse: The display turns off randomly between intervals, when set to sleep. Am I on to something? This may be related? But the problem still exists in either mode.
Alex, if this is the bug you have already fixed I will try the newest build again. It didn't seem to make a difference the last time I tested it.
Edit: Tried it in Shutter mode, the problem is still there, but not as bad or as obvious. Since you would never use 1 s for long anyway, it appears to be perfect, but that is just an illusion if you investigate further. PS- I may be on to another hint for the battery problem. It appears to get warm consistently whenever you take out the card, even when the switch is off? If this is the case the problem could occur at any time during a shoot, whenever the card is out.