Lopez,
Don't know how much field experiance you have had with elation lights but yes, we are referring to position correction. The little sensor that elation uses for all of its position correction... moving heads position correction, gobo homing, color homing, proton color wheel homing...fail from high humitity. Most elation users that are 5 or less miles from the ocean will be extremely effected. Especailly if there is no outdoor housing for the light. The salty air will destroy the sensor before the pcb is affected. I have found a more solid suplier for these sensors that hold up better to our ocean climate. I did find that Vari mag and uv sensors fit well in the elation lights and hold up through everything, but over priced, and require some *technical skill*.
However, Lopez, this really isn't to big of a problem because Gongzhau chinese designers were smart enough to allow users to turn the "feature" off.
This could be a possible solution to the Magic 250 user too.
-colorPal