White background color flashes on startup, before background color from config takes effect in parts of the rectangle occupied by Emacs. Didn't happen on 28.2, but does happen on both this RC, and the other 29 pretests. See video attachment, and please let me know if I can be of any help. In GNU Emacs 29.1 (build 2, x86_64-w64-mingw32) of 2023-07-23 built on AVALON Windowing system distributor 'Microsoft Corp.', version 10.0.19045 System Description: Microsoft Windows 10 Pro (v10.0.2009.19045.3208) Configured using: 'configure --with-modules --without-dbus --with-native-compilation=aot --without-compress-install --with-tree-sitter CFLAGS=-O2' Configured features: ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB Important settings: value of $LANG: ENU locale-coding-system: cp1252 Major mode: Fundamental Minor modes in effect: ivy-mode: t override-global-mode: t straight-use-package-mode: t straight-package-neutering-mode: t straight-symlink-emulation-mode: t straight-live-modifications-mode: t global-subword-mode: t subword-mode: t global-auto-revert-mode: t delete-selection-mode: t electric-pair-mode: t global-so-long-mode: t tooltip-mode: t global-eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: c:/Users/yanchith/.emacs.d/straight/build/transient/transient hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/transient c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-lint hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-lint c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-jump hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-jump c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-ensure hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-ensure c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-diminish hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-diminish c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-delight hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-delight c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-core hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-core c:/Users/yanchith/.emacs.d/straight/build/use-package/use-package-bind-key hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/use-package-bind-key c:/Users/yanchith/.emacs.d/straight/build/bind-key/bind-key hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/use-package/bind-key c:/Users/yanchith/.emacs.d/straight/build/csharp-mode/csharp-mode hides c:/Users/yanchith/emacs-29.1-rc1/share/emacs/29.1/lisp/progmodes/csharp-mode Features: (shadow sort mail-extr emacsbug message mailcap yank-media puny rfc822 mml mml-sec password-cache epa derived epg rfc6068 epg-config gnus-util time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils thingatpt counsel xdg xref project byte-opt dired dired-loaddefs compile text-property-search comint ansi-osc ansi-color swiper pcase abu-theme wgsl-mode-autoloads glsl-mode-autoloads csharp-mode-autoloads typescript-mode-autoloads rust-mode-autoloads counsel-autoloads swiper-autoloads ivy ring ivy-faces ivy-overlay colir color ivy-autoloads magit-autoloads magit-section-autoloads git-commit-autoloads with-editor-autoloads transient-autoloads compat-autoloads expand-region-autoloads multiple-cursors-autoloads finder-inf edmacro kmacro move-text-autoloads whitespace f-autoloads dash-autoloads s-autoloads 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