diff --git a/Cargo.lock b/Cargo.lock
index 74e877cde..a3b564601 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -910,7 +910,7 @@ dependencies = [
 [[package]]
 name = "craft-cfb"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=119415f46f601e20b9bc6b1b4d6979ceda86d88e#119415f46f601e20b9bc6b1b4d6979ceda86d88e"
+source = "git+https://github.com/storytold/craft-libs?rev=bb57d422d0bc842cbde430955825553ab7b976f4#bb57d422d0bc842cbde430955825553ab7b976f4"
 
 [[package]]
 name = "craft-csv"
@@ -965,7 +965,7 @@ dependencies = [
 [[package]]
 name = "craft-sheet"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=119415f46f601e20b9bc6b1b4d6979ceda86d88e#119415f46f601e20b9bc6b1b4d6979ceda86d88e"
+source = "git+https://github.com/storytold/craft-libs?rev=bb57d422d0bc842cbde430955825553ab7b976f4#bb57d422d0bc842cbde430955825553ab7b976f4"
 
 [[package]]
 name = "craft-ui"
@@ -990,7 +990,7 @@ dependencies = [
 [[package]]
 name = "craft-update"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=119415f46f601e20b9bc6b1b4d6979ceda86d88e#119415f46f601e20b9bc6b1b4d6979ceda86d88e"
+source = "git+https://github.com/storytold/craft-libs?rev=bb57d422d0bc842cbde430955825553ab7b976f4#bb57d422d0bc842cbde430955825553ab7b976f4"
 dependencies = [
  "chrono",
  "dunce",
@@ -1037,7 +1037,7 @@ dependencies = [
 [[package]]
 name = "craft-window"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=119415f46f601e20b9bc6b1b4d6979ceda86d88e#119415f46f601e20b9bc6b1b4d6979ceda86d88e"
+source = "git+https://github.com/storytold/craft-libs?rev=bb57d422d0bc842cbde430955825553ab7b976f4#bb57d422d0bc842cbde430955825553ab7b976f4"
 dependencies = [
  "egui",
  "objc2 0.6.5",
@@ -1056,10 +1056,13 @@ dependencies = [
 [[package]]
 name = "craft-xls"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=119415f46f601e20b9bc6b1b4d6979ceda86d88e#119415f46f601e20b9bc6b1b4d6979ceda86d88e"
+source = "git+https://github.com/storytold/craft-libs?rev=bb57d422d0bc842cbde430955825553ab7b976f4#bb57d422d0bc842cbde430955825553ab7b976f4"
 dependencies = [
  "craft-cfb",
  "craft-sheet",
+ "md-5",
+ "miniz_oxide 0.9.1",
+ "sha1 0.10.7",
  "thiserror 2.0.21",
 ]
 
@@ -3023,6 +3026,16 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4050469837a6ff301cd14c1f8f24f88549e6d548f24f64e2148eb0f72cebc51f"
 
+[[package]]
+name = "md-5"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
+dependencies = [
+ "cfg-if",
+ "digest 0.10.7",
+]
+
 [[package]]
 name = "memchr"
 version = "2.8.3"
diff --git a/Cargo.toml b/Cargo.toml
index 071fca480..11b242c25 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,12 +30,12 @@ gridcraft-math = { path = "crates/math" }
 # ui-egui, craft-print in the app, craft-web-api and craft-web-host in the web app) comes from one
 # craft-libs revision.
 # craft-update: app-specific pretend versions apply to startup and manual checks.
-craft-update = { git = "https://github.com/storytold/craft-libs", rev = "119415f46f601e20b9bc6b1b4d6979ceda86d88e", version = "=0.1.0", features = ["egui"] }
+craft-update = { git = "https://github.com/storytold/craft-libs", rev = "bb57d422d0bc842cbde430955825553ab7b976f4", version = "=0.1.0", features = ["egui"] }
 # Delimited text (CSV, TSV) and SYLK; `crates/xlsx/src/csv.rs` and `crates/engine/src/io/sylk.rs`
 # turn them into workbooks.
-craft-csv = { git = "https://github.com/storytold/craft-libs", rev = "119415f46f601e20b9bc6b1b4d6979ceda86d88e", version = "0.1.0" }
+craft-csv = { git = "https://github.com/storytold/craft-libs", rev = "bb57d422d0bc842cbde430955825553ab7b976f4", version = "0.1.0" }
 # Excel 97-2003 (.xls, BIFF8) workbooks; `crates/xlsx/src/xls.rs` maps them onto the model.
-craft-xls = { git = "https://github.com/storytold/craft-libs", rev = "119415f46f601e20b9bc6b1b4d6979ceda86d88e", version = "0.1.0" }
+craft-xls = { git = "https://github.com/storytold/craft-libs", rev = "bb57d422d0bc842cbde430955825553ab7b976f4", version = "0.1.0" }
 
 # foundation
 thiserror = "2"
@@ -78,7 +78,7 @@ skrifa = { version = "0.44", default-features = false, features = ["std"] }
 epaint_default_fonts = "0.37"
 # One native window per workbook: the window list, Window menu titles and the immediate-viewport
 # driver. Same craft-libs revision as craft-update above.
-craft-window = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "119415f46f601e20b9bc6b1b4d6979ceda86d88e", default-features = false, features = ["egui"] }
+craft-window = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "bb57d422d0bc842cbde430955825553ab7b976f4", default-features = false, features = ["egui"] }
 
 [workspace.lints.rust]
 unsafe_code = "forbid"
diff --git a/crates/engine/src/tests.rs b/crates/engine/src/tests.rs
index 8d6562d5d..927cfb544 100644
--- a/crates/engine/src/tests.rs
+++ b/crates/engine/src/tests.rs
@@ -3612,6 +3612,8 @@ fn xls_fixture() -> Vec<u8> {
     let mut put = |at: usize, v: &[u8]| b[at..at + v.len()].copy_from_slice(v);
     put(0, &[0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]);
     put(26, &3u16.to_le_bytes());
+    // The byte order mark [MS-CFB] 2.2 requires; craft-cfb refuses a header without it.
+    put(28, &0xFFFEu16.to_le_bytes());
     put(30, &9u16.to_le_bytes());
     put(32, &6u16.to_le_bytes());
     put(44, &1u32.to_le_bytes());
diff --git a/crates/xlsx/src/xls.rs b/crates/xlsx/src/xls.rs
index 5428e909e..205e806ff 100644
--- a/crates/xlsx/src/xls.rs
+++ b/crates/xlsx/src/xls.rs
@@ -68,10 +68,12 @@ fn warning(w: &x::Warning) -> String {
         W::DialogSheet => "Dialog sheets and unreadable sheets were skipped.".into(),
         W::MissingSharedString => "Some cells refer to missing shared strings and were left empty.".into(),
         W::DataTable => "What-if data tables are not supported; their values were kept.".into(),
-        W::Comments => "Cell comments in .xls files are not imported yet.".into(),
-        W::Drawings => "Pictures, charts and shapes in .xls files are not imported yet.".into(),
-        W::ConditionalFormatting => "Conditional formatting in .xls files is not imported yet.".into(),
-        W::DataValidation => "Data validation in .xls files is not imported yet.".into(),
+        W::DamagedObjects => "Some comments or drawing objects in .xls files could not be read and were skipped.".into(),
+        W::Charts => "Charts in .xls files are not imported yet.".into(),
+        W::PicturesSkipped => "Some pictures in .xls files were skipped.".into(),
+        W::ConditionalFormattingSkipped | W::ConditionalFormatting12 => "Some conditional formatting in .xls files was not imported.".into(),
+        W::DataValidationSkipped => "Some data validation in .xls files could not be read and was skipped.".into(),
+        W::DataValidationIgnored => "Some data validation records in .xls files were ignored, as Excel ignores them.".into(),
         W::Hyperlinks => "Hyperlinks in .xls files are not imported yet.".into(),
         W::PivotTables => "PivotTables in .xls files are not imported yet; their values were kept.".into(),
         W::CellsOutsideGrid(n) => format!("{n} cells outside the grid were skipped."),