Logo image distortion in toolbar using Text widget in Safari

Hi all!

I use MiCasa YOOtheme template.

I display logo and text in the toolbar using Text Widget.

In Safari my logo image is stretched vertically. I do not understand where do I need to look to fix it. I use gif image and in text use % controlling the size… without the % my image enlarged in any browsers in both directions.

Is there any tags that I can use? Like span or div to place the image without browsers interpretation?

http://www.helpinghands-sg.com/

Thank you for your suggestions!