Added info about /.rockbox filename length limit.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3229 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CUSTOM_WPS_FORMAT b/docs/CUSTOM_WPS_FORMAT
index 2302e9b..4d638b8 100644
--- a/docs/CUSTOM_WPS_FORMAT
+++ b/docs/CUSTOM_WPS_FORMAT
@@ -16,7 +16,8 @@
Custom WPS files may be located anywhere on the drive. The only restriction is
that they must end in .wps. When you PLAY a .wps file, it'll be used for the
future WPS screens. If the "played" wps file is located in the /.rockbox
-folder, it'll be remembered and used for subsequent restarts.
+folder, it'll be remembered and used for subsequent restarts. Filenames in the
+/.rockbox folder must be no more than 24 characters long.
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