Whats the maximum shutter speed that can be used safely
 

I shoot a lot at 1/50th in 50i mode which gives nice results, but on fast moving objects I get a little blurring here and there. Whats the maximum shutter speed thats safe to use, I'd like to shoot video at a race track (mainly cars and bikes).

Any input appreciated,

Mark

I've shot motor racing at almost everything up to 1/1000th but not yet on the A1. I expect it to work the same. There are reasons to shoot slower, but unlike the feel of motion you get with slower shutter speeds with still cameras, I like sharp, crisp images for video. It's all a matter of personal preference and the look you're seeking. If you have a chance, play around with it then review your footage and see what you like best and the different looks you get.

Safe in what respect? If the camera lets you shoot it, it is safe for the camcorder, but might not be for your continued employment if it results in image artifacts that your employer hates.

Faster shutter can give a different look to motion (and to captured stills of motion) which you may or may not like. As suggested by others, give it a try and see which you prefer for your projects.

In good light, you can go as fast as you wish. I used 1/15000 for the "photo finish" of a bicycle race. I got the look I wanted and could pull a still image out, too. It has a strobe effect, which is not desirable in some situations.