Hi,
We've beein solving this issue over the e-mails.
The problem is that blockquote element is not a style element, so it cannot be added to the styles drop down list.
You can enable the blockquote button for the
WYSIWYG Editor tool bar, however there is a problem with it in FireFox browser. IE can handle it just fine.
How to enable the button:
Open the \CMSAdminControls\FCKeditor\fckconfig.js file and around line 121 uncomment the 'blockquote' text.
Best regards,
Juraj Ondrus