Studio Theme: Logo/CSS padding issue for logo >50pix height

I’m using a custom logo (.png file) for my header in the studio theme. The logo has been added via theme admin > Branding Settings (uploaded via media panel).

SiteURL: (currently using 50pix high logo so no space showing).

If I use a logo that is greater than 50pix in height (eg. 70pix), there is white space between the header and the sliding Buddypress panel (see attached screenshot).

My logo needs to be at least 80pix high for the tag line to be readable.

How can I get rid of the white space when using a logo greater than 50pic high?

Thanks and all the best for 2011.