1. After upgradeing from RC3 to RC4 on my Joomla 1.5.8 site, the userlist component only displays the default list and no longer gives me the option to swtich to additional lists.
2. The name of the list is displayed in far too big characters.

Hi, check out this thread, it sounds that you mean the same.

www.joomlapolis.com/component/option,com_joomlaboard/Itemid,38/func,view/id,81640/catid,71/