Vertical align when using mouseover image

Hi,

Thank you for this plugin! A menu looks much better with images 😉

I have a problem though: when I set an image on a menu item, everything is fine, but as soon as I set an image on hover, both the normal image and the image displayed on mouseover are aligned to the top of the menu, and no longer to the middle.

Here are two screenshots showing what I mean :
http://img15.hostingpics.net/pics/701122menuimagenohover.png”>
http://img15.hostingpics.net/pics/969036menuimagehover.png

The black and white French flag has no mouseover image and is correctly positionned, whereas the UK/USA flag has a mouseover image and is not vertically aligned as I would like it to.

I’m using WordPress 3.9.1 with Responsive Theme 1.9.5.8. Is there anyting I can do ?

Thanks!

https://ww.wp.xz.cn/plugins/menu-image/