diff --git a/Cargo.toml b/Cargo.toml
index 3ce59e66842..b8a58df8bb3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -114,6 +114,7 @@ rust_2018_idioms = { level = "warn", priority = -1 }
 rust_2021_prelude_collisions = "warn"
 semicolon_in_expressions_from_macros = "warn"
 trivial_numeric_casts = "warn"
+unexpected_cfgs = "warn"
 unsafe_op_in_unsafe_fn = "warn"                         # `unsafe_op_in_unsafe_fn` may become the default in future Rust versions: https://github.com/rust-lang/rust/issues/71668
 unused_extern_crates = "warn"
 unused_import_braces = "warn"
@@ -203,7 +204,6 @@ match_same_arms = "warn"
 match_wild_err_arm = "warn"
 match_wildcard_for_single_variants = "warn"
 mem_forget = "warn"
-mismatched_target_os = "warn"
 mismatching_type_param_order = "warn"
 missing_enforced_import_renames = "warn"
 missing_errors_doc = "warn"
diff --git a/RELEASES.md b/RELEASES.md
index 79bf23bc614..a96b35be0ae 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -52,7 +52,7 @@ We don't update the MSRV in a patch release, unless we really, really need to.
 ## Preparation
 * [ ] run `scripts/generate_example_screenshots.sh` if needed
 * [ ] write a short release note that fits in a tweet
-* [ ] record gif for `CHANGELOG.md` release note (and later twitter post)
+* [ ] record gif for `CHANGELOG.md` release note (and later bluesky post)
 * [ ] update changelogs using `scripts/generate_changelog.py --version 0.x.0 --write`
 * [ ] bump version numbers in workspace `Cargo.toml`
 
@@ -87,7 +87,7 @@ I usually do this all on the `master` branch, but doing it in a release branch i
 ```
 
 ## Announcements
-* [ ] [twitter](https://x.com/ernerfeldt/status/1772665412225823105)
+* [ ] [Bluesky](https://bsky.app/profile/ernerfeldt.bsky.social)
 * [ ] egui discord
 * [ ] [r/rust](https://www.reddit.com/r/rust/comments/1bocr5s/announcing_egui_027_with_improved_menus_and/)
 * [ ] [r/programming](https://www.reddit.com/r/programming/comments/1bocsf6/announcing_egui_027_an_easytouse_crossplatform/)
diff --git a/crates/egui/src/lib.rs b/crates/egui/src/lib.rs
index 8d085842564..ccd48e860d3 100644
--- a/crates/egui/src/lib.rs
+++ b/crates/egui/src/lib.rs
@@ -625,9 +625,6 @@ pub mod special_emojis {
     /// The Github logo.
     pub const GITHUB: char = '';
 
-    /// The Twitter bird.
-    pub const TWITTER: char = '';
-
     /// The word `git`.
     pub const GIT: char = '';
 
diff --git a/crates/egui_demo_lib/src/demo/about.rs b/crates/egui_demo_lib/src/demo/about.rs
index 22fa70635c4..7c980e214fd 100644
--- a/crates/egui_demo_lib/src/demo/about.rs
+++ b/crates/egui_demo_lib/src/demo/about.rs
@@ -98,14 +98,14 @@ fn about_immediate_mode(ui: &mut egui::Ui) {
 }
 
 fn links(ui: &mut egui::Ui) {
-    use egui::special_emojis::{GITHUB, TWITTER};
+    use egui::special_emojis::GITHUB;
     ui.hyperlink_to(
         format!("{GITHUB} github.com/emilk/egui"),
         "https://github.com/emilk/egui",
     );
     ui.hyperlink_to(
-        format!("{TWITTER} @ernerfeldt"),
-        "https://twitter.com/ernerfeldt",
+        "@ernerfeldt.bsky.social",
+        "https://bsky.app/profile/ernerfeldt.bsky.social",
     );
     ui.hyperlink_to("📓 egui documentation", "https://docs.rs/egui/");
 }
diff --git a/crates/egui_demo_lib/src/demo/demo_app_windows.rs b/crates/egui_demo_lib/src/demo/demo_app_windows.rs
index 64d4d780995..b74eb7db3f4 100644
--- a/crates/egui_demo_lib/src/demo/demo_app_windows.rs
+++ b/crates/egui_demo_lib/src/demo/demo_app_windows.rs
@@ -237,10 +237,10 @@ impl DemoWindows {
                 });
 
                 ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
-                    use egui::special_emojis::{GITHUB, TWITTER};
+                    use egui::special_emojis::GITHUB;
                     ui.hyperlink_to(
-                        egui::RichText::new(TWITTER).size(font_size),
-                        "https://twitter.com/ernerfeldt",
+                        egui::RichText::new("🦋").size(font_size),
+                        "https://bsky.app/profile/ernerfeldt.bsky.social",
                     );
                     ui.hyperlink_to(
                         egui::RichText::new(GITHUB).size(font_size),
@@ -264,14 +264,14 @@ impl DemoWindows {
 
                 ui.separator();
 
-                use egui::special_emojis::{GITHUB, TWITTER};
+                use egui::special_emojis::GITHUB;
                 ui.hyperlink_to(
                     format!("{GITHUB} egui on GitHub"),
                     "https://github.com/emilk/egui",
                 );
                 ui.hyperlink_to(
-                    format!("{TWITTER} @ernerfeldt"),
-                    "https://twitter.com/ernerfeldt",
+                    "@ernerfeldt.bsky.social",
+                    "https://bsky.app/profile/ernerfeldt.bsky.social",
                 );
 
                 ui.separator();
diff --git a/crates/egui_demo_lib/src/demo/font_book.rs b/crates/egui_demo_lib/src/demo/font_book.rs
index 352bc0273a7..605b7ed7ff5 100644
--- a/crates/egui_demo_lib/src/demo/font_book.rs
+++ b/crates/egui_demo_lib/src/demo/font_book.rs
@@ -200,7 +200,6 @@ fn special_char_name(chr: char) -> Option<&'static str> {
         '\u{E600}' => Some("web-dribbble"),
         '\u{E601}' => Some("web-stackoverflow"),
         '\u{E602}' => Some("web-vimeo"),
-        '\u{E603}' => Some("web-twitter"),
         '\u{E604}' => Some("web-facebook"),
         '\u{E605}' => Some("web-googleplus"),
         '\u{E606}' => Some("web-pinterest"),