diff --git a/collects/scribblings/gui/snip-class.scrbl b/collects/scribblings/gui/snip-class.scrbl
index 56e07c02bb..dd590f4a03 100644
--- a/collects/scribblings/gui/snip-class.scrbl
+++ b/collects/scribblings/gui/snip-class.scrbl
@@ -338,9 +338,10 @@ following symbols:
  @item{@indexed-scheme['handles-events] --- this snip can handle
        keyboard and mouse events when it has the keyboard focus}
 
- @item{@indexed-scheme['handles-all-mouse-events] --- this snip can handle
-       mouse events that touch the snip, even if the snip does not
-       have the keyboard focus}
+ @item{@indexed-scheme['handles-all-mouse-events] --- this snip can
+       handle mouse events that touch the snip or that immediately
+       follow an event that touches the snip, even if the snip does
+       not have the keyboard focus}
 
  @item{@indexed-scheme['width-depends-on-x] --- this snip's display
        width depends on the snip's x-@techlink{location} within the
diff --git a/collects/scribblings/inside/custodians.scrbl b/collects/scribblings/inside/custodians.scrbl
index c87a2f07e0..3aad44c400 100644
--- a/collects/scribblings/inside/custodians.scrbl
+++ b/collects/scribblings/inside/custodians.scrbl
@@ -103,5 +103,15 @@ Installs a function to be called on each custodian-registered item and
                                   void *d);
 }
 
-where @var{d} is the second argument for @var{f}.}
+where @var{d} is the second argument for @var{f}.
 
+At-exit functions are run in reverse of the order that they are
+added. An at-exit function is initially registered (and therefore runs
+last) that flushes each file-stream output port.
+
+An at-exit function should not necessarily apply the closer function
+for every object that it is given. In particular, shutting down a
+file-stream output port would disable the flushing action of the final
+at-exit function. Typically, an at-exit function ignores most objects
+while handling a specific type of object that requires a specific
+clean-up action before the OS-level process terminates.}