set _prefix {}
                }]
        && [catch {
+               # beware that from the .git dir this sets _gitdir to .
+               # and _prefix to the empty string
                set _gitdir [git rev-parse --git-dir]
                set _prefix [git rev-parse --show-prefix]
        } err]} {
        choose_repository::pick
        set picked 1
 }
+
+# we expand the _gitdir when it's just a single dot (i.e. when we're being
+# run from the .git dir itself) lest the routines to find the worktree
+# get confused
+if {$_gitdir eq "."} {
+       set _gitdir [pwd]
+}
+
 if {![file isdirectory $_gitdir] && [is_Cygwin]} {
        catch {set _gitdir [exec cygpath --windows $_gitdir]}
 }
        } elseif {$s0 ne {_} && [string index $state 0] eq {_}
                && $head_info eq {}} {
                set head_info $index_info
+       } elseif {$s0 eq {_} && [string index $state 0] ne {_}} {
+               set index_info $head_info
+               set head_info {}
        }
 
        set file_states($path) [list $s0$s1 $icon \
                cd [file dirname [gitdir]]
                set env(GIT_DIR) [file tail [gitdir]]
 
-               eval exec $cmd $revs &
+               eval exec $cmd $revs "--" "--" &
 
                if {$old_GIT_DIR eq {}} {
                        unset env(GIT_DIR)
        }
 
        set ret_code $rc
+
+       # Briefly enable send again, working around Tk bug
+       # http://sourceforge.net/tracker/?func=detail&atid=112997&aid=1821174&group_id=12997
+       tk appname [appname]
+
        destroy .
 }
 
                [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
        .mbar.commit add command -label [mc "Unstage From Commit"] \
-               -command do_unstage_selection
+               -command do_unstage_selection \
+               -accelerator $M1T-U
        lappend disable_on_lock \
                [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
        .mbar.commit add command -label [mc "Revert Changes"] \
-               -command do_revert_selection
+               -command do_revert_selection \
+               -accelerator $M1T-J
        lappend disable_on_lock \
                [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
 bind $ui_comm <$M1B-Key-Return> {do_commit;break}
 bind $ui_comm <$M1B-Key-t> {do_add_selection;break}
 bind $ui_comm <$M1B-Key-T> {do_add_selection;break}
+bind $ui_comm <$M1B-Key-u> {do_unstage_selection;break}
+bind $ui_comm <$M1B-Key-U> {do_unstage_selection;break}
+bind $ui_comm <$M1B-Key-j> {do_revert_selection;break}
+bind $ui_comm <$M1B-Key-J> {do_revert_selection;break}
 bind $ui_comm <$M1B-Key-i> {do_add_all;break}
 bind $ui_comm <$M1B-Key-I> {do_add_all;break}
 bind $ui_comm <$M1B-Key-x> {tk_textCut %W;break}