+** gnus-group-charset-alist and gnus-group-ignored-charsets-alist
+
+The regexps in these variables are compared with full group names
+instead of real group names in 5.8. Users who customize these
+variables should change those regexps accordingly. For example:
+
+ ("^han\\>" euc-kr) -> ("\\(^\\|:\\)han\\>" euc-kr)
+