Alignment error in footer with Firefox

Hi there,

I’m using the kubrick theme, slightly edited, for my blog. I’ve noticed that in Firefox there is an alignment error in the footer, but not in IE. I’ve taken some screenshots so you can see the comparison here;

https://www.zenedar.com/images/alignmentproblem.jpg

Does anyone have any idea what could cause this? The only footer editing i’ve done is in the Theme Editor within the Admin section, where I added a line about copyright (<br />All content is copyright &copy; 2006 <a href="https://www.markhaldanephotography.com/">Mark Haldane</a>)

Surely this doesn’t cause it to misalign?

Thanks for any help!