hiding .right does too much. specify precise class names instead.

bt5/erp5_km/SkinTemplateItem/portal_skins/erp5_km_theme/km_css/km.css.xml

@@ -558,7 +558,7 @@ fieldset.registration {\n
 \n
 <tal:block tal:condition="not:display_anonymous_user_registration">\n
 /* We hide registration form fieldset and expand login fieldset*/\n
-fieldset.right{\n
+fieldset.registration.right {\n
   display:none;\n
 }\n
 fieldset.left{\n

bt5/erp5_km/bt/revision

-1820
\ No newline at end of file
+1821
\ No newline at end of file