diff --git a/CHECKLST.txt b/CHECKLST.txt
index 73b8c45c..a67395de 100644
--- a/CHECKLST.txt
+++ b/CHECKLST.txt
@@ -37,14 +37,26 @@ Things to do during the branch-stabilisation period:
    word XXX-REVIEW-BEFORE-RELEASE. (Any such comments should state
    clearly what needs to be done.)
 
- - Do some testing of the Windows version with Minefield (you can
-   build a Minefield version using 'bob . XFLAGS=-DMINEFIELD'), and of
-   the Unix version with valgrind and/or Address Sanitiser. In
-   particular, any headline features for the release should get a
-   workout with memory checking enabled!
+ - Test the Unix build with Address Sanitiser. In particular, any
+   headline features for the release should get a workout with memory
+   checking enabled!
 
- - Test the CMake build scripts with the oldest CMake they claim to
-   support, on both Unix and Windows.
+ - Test the Windows build with Address Sanitiser too (as of VS 2022).
+    + In the course of that, give a recent Windows pterm a try, to
+      make sure that still works.
+
+ - Test building and running on old platforms:
+    + build on Debian stretch (containing CMake 3.7, the earliest
+      CMake we claim support for)
+    + build with all three major versions of GTK
+    + build the old-Windows binaries and test-run them on Win95 (PuTTY
+      proper even without WinSock2)
+
+ - Check Coverity is happy.
+
+ - Check the side-channel tester is happy.
+
+ - Check all the non-SSH network backends still basically work.
 
 Making a release candidate build
 --------------------------------
diff --git a/unix/window.c b/unix/window.c
index de75a1c2..64efb968 100644
--- a/unix/window.c
+++ b/unix/window.c
@@ -2564,8 +2564,10 @@ static void request_resize_internal(GtkFrontend *inst, bool from_terminal,
         GdkWindowState state = gdk_window_get_state(gdkwin);
         if (state & (GDK_WINDOW_STATE_MAXIMIZED |
                      GDK_WINDOW_STATE_FULLSCREEN |
-#if GTK_CHECK_VERSION(3,0,0)
+#if GTK_CHECK_VERSION(3,10,0)
                      GDK_WINDOW_STATE_TILED |
+#endif
+#if GTK_CHECK_VERSION(3,22,23)
                      GDK_WINDOW_STATE_TOP_TILED |
                      GDK_WINDOW_STATE_RIGHT_TILED |
                      GDK_WINDOW_STATE_BOTTOM_TILED |