Below is a list of the bugs that are fixed by patch 1 for Tk 4.0
(Tk 4.0p1):

7/18/95 (bug fix) %t in event bindings didn't work properly for some
events (e.g. PropertyNotify).

7/18/95 (bug fix) Changed "exec wish" lines in demo scripts to
"exec wish4.0" to avoid version conflicts.

7/18/95 (bug fix) Fixed round-off errors in scrolling for texts,
canvases, listboxes, and entries.  The error could cause the view
to shift up in a command like "$w yview moveto [lindex [$w yview] 0]".

7/19/95 (bug fix) Canvases weren't always redrawing borders correctly
when they became unobscured.  There were also some problems with
improper refresh after size changes.

7/19/95 (bug fix) Fixed bug in text index processing that causes
tests textIndex-11.1 and textIndex12.1 to fail on some platforms.

7/19/95 (bug fix) Fixed bug where 2-second delays were ocurring during
"raise" and "lower" commands for toplevel windows under some window
managers (such as fvwm).

7/20/95 (bug fix) Text searches were misbehaving when there were embedded
windows on the starting line of the search.  The most common symptom is
that Tk would fail to find a match at the starting position for the
search.

7/22/95 (bug fix) Fixed core dump that could occur in menus if a checkbutton
entry's -variable option referred to an array (or couldn't be read
by the menu C code for some other reason).

7/22/95 (bug fix) Text widgets didn't update their scrollbars when
changes were made to information that was off-screen.

7/25/95 (bug fix) Fixed core-dump in tkListbox.c that used to happen
in the command ".l bbox end" if the listbox was empty.

7/25/95 (bug fix) Page-up and page-down bindings for listboxes didn't
move active element to remain on the screen.

7/25/95 (bug fix) Patched around H-P compiler problem that results in
core-dumps in tkImgPhoto.c during image handling.

7/25/95 (bug fix) Fixed bug in tkImgPhoto.c that caused core dumps
(during Tk self-tests and other image uses) on AIX and other machines
where "schar" in tkImgPhoto.c was being defined as "short" instead of
"char".

7/26/95 (bug fix) The PPM image reader couldn't handle maximum intensity
values other than 255.

7/26/95 (bug fix) Canvases didn't redraw their borders when the relief
changed from raised to flat.

7/27/95 (bug fix) Canvases didn't set the scrolling values correctly
when no scroll region was specified.

7/28/95 (bug fix) Modified menu and tk_dialog scripts to restore any
old grab that might have been in effect before a menu or dialog was
posted.