diff --git a/collects/web-server/scribblings/tutorial/images/Flow1.dia b/collects/web-server/scribblings/tutorial/images/flow1.dia
similarity index 100%
rename from collects/web-server/scribblings/tutorial/images/Flow1.dia
rename to collects/web-server/scribblings/tutorial/images/flow1.dia
diff --git a/collects/web-server/scribblings/tutorial/images/Flow1.png b/collects/web-server/scribblings/tutorial/images/flow1.png
similarity index 100%
rename from collects/web-server/scribblings/tutorial/images/Flow1.png
rename to collects/web-server/scribblings/tutorial/images/flow1.png
diff --git a/collects/web-server/scribblings/tutorial/images/Flow2.dia b/collects/web-server/scribblings/tutorial/images/flow2.dia
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rename from collects/web-server/scribblings/tutorial/images/Flow2.dia
rename to collects/web-server/scribblings/tutorial/images/flow2.dia
diff --git a/collects/web-server/scribblings/tutorial/images/Flow2.png b/collects/web-server/scribblings/tutorial/images/flow2.png
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rename from collects/web-server/scribblings/tutorial/images/Flow2.png
rename to collects/web-server/scribblings/tutorial/images/flow2.png
diff --git a/collects/web-server/scribblings/tutorial/images/Flow3.dia b/collects/web-server/scribblings/tutorial/images/flow3.dia
similarity index 100%
rename from collects/web-server/scribblings/tutorial/images/Flow3.dia
rename to collects/web-server/scribblings/tutorial/images/flow3.dia
diff --git a/collects/web-server/scribblings/tutorial/images/Flow3.png b/collects/web-server/scribblings/tutorial/images/flow3.png
similarity index 100%
rename from collects/web-server/scribblings/tutorial/images/Flow3.png
rename to collects/web-server/scribblings/tutorial/images/flow3.png
diff --git a/collects/web-server/scribblings/tutorial/web-server-tutorial.scrbl b/collects/web-server/scribblings/tutorial/web-server-tutorial.scrbl
index c06540a11e..c46a969eea 100644
--- a/collects/web-server/scribblings/tutorial/web-server-tutorial.scrbl
+++ b/collects/web-server/scribblings/tutorial/web-server-tutorial.scrbl
@@ -533,7 +533,7 @@ the user add new comments.
 Here's a diagram of a simple page flow of our web application that
 should let us add comments.
 
-@image{scribblings/tutorial/images/Flow1.png}
+@image{scribblings/tutorial/images/flow1.png}
 
 Each point in the diagram corresponds to a request-consuming handler.
 As we might suspect, we'll be using @scheme[send/suspend/dispatch] some more.
@@ -565,7 +565,7 @@ Here's a diagram of a our revised page flow of our web application.
 Maybe we can just add a BACK link from the @scheme[render-post-detail-page]
 that gets us back to viewing the top-level blog.
 
-@image{scribblings/tutorial/images/Flow2.png}
+@image{scribblings/tutorial/images/flow2.png}
 
 @bold{Exercise.} Adjust @scheme[render-post-detail-page] to include another link that goes
 back to @scheme[render-blog-page].
@@ -574,7 +574,7 @@ To make this more interesting, maybe we should enrich the flow a
 bit more.  We can give the user a choice right before committing to
 their comment.  Who knows?  They may have a change of heart.
 
-@image{scribblings/tutorial/images/Flow3.png}
+@image{scribblings/tutorial/images/flow3.png}
 
 Although this seems complicated, the shape of our handlers will look
 more-or-less like what we had before.  After we've added all the
@@ -1268,4 +1268,4 @@ This is, admittedly, not the simplest imaginable way of setting up a server, but
 
 As you move forward on your own applications, you may find many useful packages on PLaneT. There are interfaces to other
 databases. Many tools for generating HTML, XML, and Javascript output. Etc. There is also an active community of
-users on the @scheme[plt-scheme] mailing list. We welcome new users!
\ No newline at end of file
+users on the @scheme[plt-scheme] mailing list. We welcome new users!