deleting files and then resume is not good


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13412 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/KNOWN_ISSUES b/docs/KNOWN_ISSUES
index 4ae88cb..0c44acc 100644
--- a/docs/KNOWN_ISSUES
+++ b/docs/KNOWN_ISSUES
@@ -40,3 +40,6 @@
   Files like these require quite a bit of memory to decode, more than what
   Rockbox has set aside for the purpose. Adding a real malloc for the codecs
   might help...
+
+FS#6411 - Resuming a playlist after having deleted one or more files makes
+  the resume point end up on the wrong song.