[SOLVED] Product image in Product detail form

Hi,

I have noticed a strange behavior in the product detail page while user moves mouse cursor on images thumbnail.
if you have several images as thumbnails and you move mouse cursor on it, the "reserved place" (i mean the image in the div called "hikashop_main_image_thumb_div") of standard image changes image view/size.

i attached a GIF animated to make it clearer.
1 second is normal size, after....it gets crazy:-)

What could be the problem ? i was thinking issue could come from image size itself as images could have different sizes but in this case the main image ration shouldn't change.

thx.

This is what i did after checking if a new version existed... and it's true that such issue is not anymore present after updgrade.
thx.