Hi, while i was looking for some other problem i found that your plugin gives some notices.
Notice: Use of undefined constant WPRBLVERSION – assumed ‘WPRBLVERSION’ in WP-Render-Blogroll.php on line 19
Notice: Undefined variable: classname in WP-Render-Blogroll.php on line 83
I guess for the first one, the single quotes are missing.
For the second one i think $classname could be replaced by $linkclass. All other checks for empty variable you use the same variable names.
Of course, there could be a reason why you set $classname instead of $linkclass.
Hope this helps.