Cursor redraw problem with :set foldmethod=marker, Mac OS X 10.4.9, GVIM

Hi,

When I have foldmethod=marker in GVIM and I scroll by holding down the j or
k keys, the cursor fails to redraw as it moves down or up the page, although
once I stop scrolling the cursor redraws again at the current line, which is
usually about 8-10 lines below the original line.  It is not necessary to
have any actual folds in the file to observe this behavior, just
foldmethod=marker.  Everything works fine in the Terminal, however.  I'm on
a dual G5, OS X 10.4.9.  I tried applying the patches and compiling on my
own, but it didn't help.

Here's the output from "vim --version":

VIM - Vi IMproved 7.0 (2006 May 7, compiled Feb 27 2007 17:13:53)
MacOS X (unix) version
Included patches: 1-205
Compiled by kwsmith1-63mtpxcE9Cs@xxxxxxxxxxxxxxxx
Huge version with Carbon GUI.  Features included (+) or not (-):
+arabic +autocmd -balloon_eval +browse ++builtin_terms +byte_offset +cindent

-clientserver +clipboard +cmdline_compl +cmdline_hist +cmdline_info
+comments
+cryptv +cscope +cursorshape +dialog_con_gui +diff +digraphs -dnd -ebcdic
+emacs_tags +eval +ex_extra +extra_search +farsi +file_in_path +find_in_path

+folding -footer +fork() +gettext -hangul_input +iconv +insert_expand
+jumplist
+keymap +langmap +libcall +linebreak +lispindent +listcmds +localmap +menu
+mksession +modify_fname +mouse -mouseshape +mouse_dec -mouse_gpm
-mouse_jsbterm +mouse_netterm +mouse_xterm +multi_byte +multi_lang -mzscheme

-netbeans_intg -osfiletype +path_extra +perl +postscript +printer +profile
+python +quickfix +reltime +rightleft -ruby +scrollbind +signs +smartindent
-sniff +statusline -sun_workshop +syntax +tag_binary +tag_old_static
-tag_any_white +tcl +terminfo +termresponse +textobjects +title -toolbar
+user_commands +vertsplit +virtualedit +visual +visualextra +viminfo
+vreplace
+wildignore +wildmenu +windows +writebackup -X11 -xfontset -xim -xsmp
-xterm_clipboard -xterm_save
  system vimrc file: "$VIM/vimrc"
    user vimrc file: "$HOME/.vimrc"
     user exrc file: "$HOME/.exrc"
 system gvimrc file: "$VIM/gvimrc"
   user gvimrc file: "$HOME/.gvimrc"
   system menu file: "$VIMRUNTIME/menu.vim"
 fall-back for $VIM: "/Applications/Vim.app/Contents /Resources/vim"
Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_MAC -fno-common
-fpascal-strings -Wall -Wno-unknown-pragmas -mdynamic-no-pic -pipe -I.
-Iproto -arch ppc -DMACOS_X_UNIX -no-cpp-precomp
-I/Developer/Headers/FlatCarbon  -O -fno-strength-reduce -Wall    -g
-DPERL_DARWIN -no-cpp-precomp -fno-strict-aliasing -I/usr/local/include
-I/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE
-I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5
-I/System/Library/Frameworks/Tcl.framework/Headers  -D_REENTRANT=1
-D_THREAD_SAFE=1
Linking: gcc   -arch ppc -L/usr/local/lib -o Vim -framework Carbon
-lncurses  -liconv -lintl   -L/usr/local/lib
/System/Library/Perl/5.8.6/darwin-thread-multi-2level/auto/DynaLoader/DynaLoader.a
-L/System/Library/Perl/5.8.6/darwin-thread-multi-2level/CORE -lperl -lm -lc
-framework Python -framework Tcl -framework CoreFoundation