diff --git a/bash-completion-1.3-filedir.bash b/bash-completion-1.3-filedir.bash
new file mode 100644
index 0000000..95f9593
--- /dev/null
+++ b/bash-completion-1.3-filedir.bash
@@ -0,0 +1,36 @@
+# This is a copy of the _filedir function in bash_completion, included
+# and (re)defined separately here because some versions of Adobe Reader,
+# if installed, are known to override this function with an incompatible
+# version, causing various problems.
+#
+# https://bugzilla.redhat.com/677446
+# http://forums.adobe.com/thread/745833
+
+_filedir()
+{
+    local i IFS=$'\n' xspec
+
+    _tilde "$cur" || return 0
+
+    local -a toks
+    local quoted tmp
+
+    _quote_readline_by_ref "$cur" quoted
+    toks=( ${toks[@]-} $(
+        compgen -d -- "$quoted" | {
+            while read -r tmp; do
+                printf '%s\n' $tmp
+            done
+        }
+    ))
+
+    if [[ "$1" != -d ]]; then
+        [[ ${BASH_VERSINFO[0]} -ge 4 ]] && \
+            xspec=${1:+"!*.@($1|${1^^})"} || \
+            xspec=${1:+"!*.@($1|$(printf %s $1 | tr '[:lower:]' '[:upper:]'))"}
+        toks=( ${toks[@]-} $( compgen -f -X "$xspec" -- $quoted) )
+    fi
+    [ ${#toks[@]} -ne 0 ] && _compopt_o_filenames
+
+    COMPREPLY=( "${COMPREPLY[@]}" "${toks[@]}" )
+}
diff --git a/bash-completion.spec b/bash-completion.spec
index 855462d..54bc4b2 100644
--- a/bash-completion.spec
+++ b/bash-completion.spec
@@ -3,7 +3,7 @@
 
 Name:           bash-completion
 Version:        1.3
-Release:        3%{?dist}
+Release:        4%{?dist}
 Epoch:          1
 Summary:        Programmable completion for Bash
 
@@ -13,6 +13,8 @@ URL:            http://bash-completion.alioth.debian.org/
 Source0:        http://bash-completion.alioth.debian.org/files/%{name}-%{version}.tar.bz2
 Source1:        %{name}-plague-client
 Source2:        CHANGES.package.old
+# https://bugzilla.redhat.com/677446
+Source3:        %{name}-1.3-filedir.bash
 # Non-upstream: adjust helpers dir location to our modified layout
 Patch0:         %{name}-1.3-helpersdir.patch
 # Non-upstream: see comments in patch
@@ -107,6 +109,7 @@ for f in bash-builtins configure coreutils dd getent iconv ifupdown \
     module-init-tools rpm service sh util-linux ; do
     mv $RPM_BUILD_ROOT%{_datadir}/%{name}/$f .
 done
+install -pm 644 %{SOURCE3} redefine_filedir
 
 cd - # $RPM_BUILD_ROOT%{_sysconfdir}/bash_completion.d
 
@@ -370,6 +373,7 @@ fi
 %{_sysconfdir}/bash_completion.d/iconv
 %{_sysconfdir}/bash_completion.d/ifupdown
 %{_sysconfdir}/bash_completion.d/module-init-tools
+%{_sysconfdir}/bash_completion.d/redefine_filedir
 %{_sysconfdir}/bash_completion.d/rpm
 %{_sysconfdir}/bash_completion.d/service
 %{_sysconfdir}/bash_completion.d/sh
@@ -380,6 +384,9 @@ fi
 
 
 %changelog
+* Tue May 10 2011 Ville Skyttä <ville.skytta@iki.fi> - 1:1.3-4
+- Work around problems caused by Adobe Reader overriding _filedir (#677446).
+
 * Tue Apr 12 2011 Ville Skyttä <ville.skytta@iki.fi> - 1:1.3-3
 - Patch to not test command availability for each snippet, improves load time.
 - Apply upstream libreoffice flat XML extensions fix for #692548.