diff -r 2c917663b023 runtime/autoload/netrw.vim
--- a/runtime/autoload/netrw.vim	Tue Jul 10 18:13:00 2012 +0900
+++ b/runtime/autoload/netrw.vim	Tue Jul 10 18:14:39 2012 +0900
@@ -1899,7 +1899,7 @@
    nnoremap <buffer> <silent> mu	:<c-u>call <SID>NetrwUnMarkFile(0)<cr>
    nnoremap <buffer> <silent> mx	:<c-u>call <SID>NetrwMarkFileExe(0)<cr>
    nnoremap <buffer> <silent> mz	:<c-u>call <SID>NetrwMarkFileCompress(0)<cr>
-   nnoremap <buffer> <silent> gb	:<c-u>call <SID>NetrwBookHistHandler(1,b:netrw_cur)<cr>
+   nnoremap <buffer> <silent> gb	:<c-u>call <SID>NetrwBookHistHandler(1,b:netrw_curdir)<cr>
    nnoremap <buffer> <silent> gh	:<c-u>call <SID>NetrwHidden(0)<cr>
    nnoremap <buffer> <silent> gp	:<c-u>call <SID>NetrwChgPerm(0,b:netrw_curdir)<cr>
    nnoremap <buffer> <silent> C		:let g:netrw_chgwin= winnr()<cr>
@@ -1942,7 +1942,7 @@
    inoremap <buffer> <silent> mu	<c-o>:<c-u>call <SID>NetrwUnMarkFile(0)<cr>
    inoremap <buffer> <silent> mx	<c-o>:<c-u>call <SID>NetrwMarkFileExe(0)<cr>
    inoremap <buffer> <silent> mz	<c-o>:<c-u>call <SID>NetrwMarkFileCompress(0)<cr>
-   inoremap <buffer> <silent> gb	<c-o>:<c-u>call <SID>NetrwBookHistHandler(1,b:netrw_cur)<cr>
+   inoremap <buffer> <silent> gb	<c-o>:<c-u>call <SID>NetrwBookHistHandler(1,b:netrw_curdir)<cr>
    inoremap <buffer> <silent> gh	<c-o>:<c-u>call <SID>NetrwHidden(0)<cr>
    inoremap <buffer> <silent> gp	<c-o>:<c-u>call <SID>NetrwChgPerm(0,b:netrw_curdir)<cr>
    inoremap <buffer> <silent> C		<c-o>:let g:netrw_chgwin= winnr()<cr>