autologoutlink="true" causes login button increase in width in Firefox 14
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Recently (not sure when) the fb:login-button on my site has started to slowly increase in width in Firefox. I can stop this happening by setting autologoutlink="false", but I would like to keep it set to true. You can see this on the following site as the "Backup" button creeps across the page, left to right.

http://grepbook.co.uk/