also add a note explaining the somewhat low limit.
---
 man/mark.man |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/man/mark.man b/man/mark.man
index eff4bf0..130b4fd 100644
--- a/man/mark.man
+++ b/man/mark.man
@@ -153,7 +153,9 @@ be one of the (reserved) message names \*(lqnew\*(rq, 
\*(lqfirst\*(rq,
 .PP
 .IP \(bu 2
 Only a certain number of sequences may be defined for a given folder.
-This number is usually limited to 26 (10 on small systems).
+This number is usually limited to 27 (11 on small systems).  (The
+internal implementation relies on bitmasks, with some bits set aside
+for internal use.)
 .PP
 .IP \(bu 2
 Message ranges with user\-defined sequence names are restricted to the
-- 
1.7.4.1
=---------------------
 paul fox, pgf(_at_)foxharp(_dot_)boston(_dot_)ma(_dot_)us (arlington, ma, 
where it's 32.5 degrees)
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