What I did was edit the yoast-breadcrumbs.php file. On Line 221 (version 0.8.5) the code show is:
$output = $homelink.' '.$opt['sep'].' '.bold_or_not($opt['blog']);
I took out the ‘sep’ so it looks like this:
$output = $homelink.' '.$opt[''].' '.bold_or_not($opt['blog']);
This might not solve the problem with a plugin upgrade by Yoast as it could get written over. We’ll put it to test for now.