Description:
If you want to repeat the blinking animation (well, usually just a single blink is not much useful!) the blinking itself will be very strange, much much faster of what you would expect and not much usable, because the time the element is visible is too little compared to the time it's hidden.

Steps to Reproduce:
Let's suppose we want to apply a repeating blinking effect to some element in a page (not just to a text).

1. Create a new presentation and create some element like a Rectangle or an Ellipse.

2. Select the element and add the "Emphasis: Blink" effect to it, and set the Duration of the effect to 1 sec and a Repeat value of 10.

3. Start the presentation (F5) and click to start the animation.

 For example, if you set a Duration of 1 sec and a Repeat value of 10, you would expect 10 blinkings of 1 second each one (so, the animation should last 10 seconds in total). Instead, what you get are 10 strange blinkings (as I said before, during a single blinking, the time in which the element is visible is too little) in about 5-6 seconds.



Actual Results:
The total duration of the animation is about 5-6 seconds instead of the 10 seconds you would expect (1sec x 10 repetitions = 10 sec). 
And the blinkings look very strange, because the time during which the element is visible is too little compared to the time it's hidden, so the blinking animation is not much usable in this way. I don't see other parameters that you can change to balance the time the blinking element is hidden vs the time the element is visible.

Expected Results:
You would expect an animation with a total duration of 10 seconds (1sec x 10 repetitions = 10 sec). And you would expect the time the element remains hidden to be the same of the time the element remains visible. For example, in a blinking of 1 sec you would expect that for 0.5 sec the element is hidden and the other 0.5 sec is visible.


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Bug present on versions: 6.3.6.2 (x64) and 6.4.3.2 (x64). I don't know if it affects earlier versions too.