diff --git a/localization/i18n/uk/OrcaSlicer_uk.po b/localization/i18n/uk/OrcaSlicer_uk.po
index f256fba815..2a4a84963c 100644
--- a/localization/i18n/uk/OrcaSlicer_uk.po
+++ b/localization/i18n/uk/OrcaSlicer_uk.po
@@ -4625,7 +4625,7 @@ msgstr "Вигляд зверху"
 
 #. TRN To be shown in the main menu View->Bottom
 msgid "Bottom"
-msgstr "Ніз"
+msgstr "Низ"
 
 msgid "Bottom View"
 msgstr "Вигляд знизу"
diff --git a/scripts/generate_presets_vendors.py b/scripts/generate_presets_vendors.py
index 2dd53db53a..ac358ae803 100644
--- a/scripts/generate_presets_vendors.py
+++ b/scripts/generate_presets_vendors.py
@@ -110,6 +110,7 @@ filament_vendors = [
     'Justmaker',
     'Keene Village Plastics',
     'Kexcelled',
+    'LDO',
     'MakerBot',
     'MatterHackers',
     'MIKA3D',
diff --git a/src/libslic3r/Format/bbs_3mf.cpp b/src/libslic3r/Format/bbs_3mf.cpp
index 206fc2aacd..f13181ad27 100644
--- a/src/libslic3r/Format/bbs_3mf.cpp
+++ b/src/libslic3r/Format/bbs_3mf.cpp
@@ -6813,7 +6813,12 @@ void PlateData::parse_filament_info(GCodeProcessorResult *result)
                 return false;
             }
 
-            std::string type = (volume->type() == ModelVolumeType::MODEL_PART)?"model":"other";
+            // Orca#7574: always use "model" type to follow the 3MF Core Specification:
+            // https://github.com/3MFConsortium/spec_core/blob/20c079eef39e45ed223b8443dc9f34cbe32dc2c2/3MF%20Core%20Specification.md#3431-item-element
+            // > Note: items MUST NOT reference objects of type "other", either directly or recursively.
+            // This won't break anything because when loading the file Orca (and Bambu) simply does not care about the actual object type at all (as long as it's one of "model" & "other");
+            // But PrusaSlicer requires the type to be "model".
+            std::string type = "model";
 
             output_buffer += "  <";
             output_buffer += OBJECT_TAG;
diff --git a/src/libslic3r/calib.hpp b/src/libslic3r/calib.hpp
index b26a000790..19b19cf347 100644
--- a/src/libslic3r/calib.hpp
+++ b/src/libslic3r/calib.hpp
@@ -266,8 +266,18 @@ public:
 protected:
     double speed_first_layer() const { return m_config.option<ConfigOptionFloat>("initial_layer_speed")->value; };
     double speed_perimeter() const { return m_config.option<ConfigOptionFloat>("outer_wall_speed")->value; };
-    double line_width_first_layer() const { return m_config.get_abs_value("initial_layer_line_width"); };
-    double line_width() const { return m_config.get_abs_value("line_width"); };
+    double line_width_first_layer() const
+    {
+        // TODO: FIXME: find out current filament/extruder?
+        const double nozzle_diameter = m_config.opt_float("nozzle_diameter", 0);
+        return m_config.get_abs_value("initial_layer_line_width", nozzle_diameter);
+    };
+    double line_width() const
+    {
+        // TODO: FIXME: find out current filament/extruder?
+        const double nozzle_diameter = m_config.opt_float("nozzle_diameter", 0);
+        return m_config.get_abs_value("line_width", nozzle_diameter);
+    };
     int    wall_count() const { return m_config.option<ConfigOptionInt>("wall_loops")->value; };
 
 private:
diff --git a/src/slic3r/GUI/CreatePresetsDialog.cpp b/src/slic3r/GUI/CreatePresetsDialog.cpp
index 6606d5f5f5..4161afc573 100644
--- a/src/slic3r/GUI/CreatePresetsDialog.cpp
+++ b/src/slic3r/GUI/CreatePresetsDialog.cpp
@@ -50,14 +50,14 @@ static const std::vector<std::string> filament_vendors =
      "Fil X",                  "GEEETECH",               "Giantarm",               "Gizmo Dorks",            "GreenGate3D",
      "HATCHBOX",               "Hello3D",                "IC3D",                   "IEMAI",                  "IIID Max",
      "INLAND",                 "iProspect",              "iSANMATE",               "Justmaker",              "Keene Village Plastics",
-     "Kexcelled",              "MakerBot",               "MatterHackers",          "MIKA3D",                 "NinjaTek",
-     "Nobufil",                "Novamaker",              "OVERTURE",               "OVVNYXE",                "Polymaker",
-     "Priline",                "Printed Solid",          "Protopasta",             "Prusament",              "Push Plastic",
-     "R3D",                    "Re-pet3D",               "Recreus",                "Regen",                  "RatRig",
-     "Sain SMART",             "SliceWorx",              "Snapmaker",              "SnoLabs",                "Spectrum",
-     "SUNLU",                  "TTYT3D",                 "Tianse",                 "UltiMaker",              "Valment",
-     "Verbatim",               "VO3D",                   "Voxelab",                "VOXELPLA",               "YOOPAI",
-     "Yousu",                  "Ziro",                   "Zyltech"};
+     "Kexcelled",              "LDO",                    "MakerBot",               "MatterHackers",          "MIKA3D",
+     "NinjaTek",               "Nobufil",                "Novamaker",              "OVERTURE",               "OVVNYXE",
+     "Polymaker",              "Priline",                "Printed Solid",          "Protopasta",             "Prusament",
+     "Push Plastic",           "R3D",                    "Re-pet3D",               "Recreus",                "Regen",
+     "RatRig",                 "Sain SMART",             "SliceWorx",              "Snapmaker",              "SnoLabs",
+     "Spectrum",               "SUNLU",                  "TTYT3D",                 "Tianse",                 "UltiMaker",
+     "Valment",                "Verbatim",               "VO3D",                   "Voxelab",                "VOXELPLA",
+     "YOOPAI",                 "Yousu",                  "Ziro",                   "Zyltech"};
      
 static const std::vector<std::string> filament_types = {"PLA",    "rPLA",  "PLA+",      "PLA Tough", "PETG",  "ABS",    "ASA",    "FLEX",   "HIPS",   "PA",     "PACF",
                                                         "NYLON",  "PVA",   "PVB",       "PC",        "PCABS", "PCTG",   "PCCF",   "PHA",    "PP",     "PEI",    "PET",
diff --git a/src/slic3r/GUI/ImageGrid.cpp b/src/slic3r/GUI/ImageGrid.cpp
index 15adf8c8ca..ebfdb33ea4 100644
--- a/src/slic3r/GUI/ImageGrid.cpp
+++ b/src/slic3r/GUI/ImageGrid.cpp
@@ -652,7 +652,8 @@ void Slic3r::GUI::ImageGrid::renderContent1(wxDC &dc, wxPoint const &pt, int ind
         if (hit) {
             texts.Add(_L("Delete"));
             texts.Add(secondAction);
-            texts.Add(thirdAction);
+            if (!thirdAction.IsEmpty())
+                texts.Add(thirdAction);
             renderButtons(dc, texts, rect, m_hit_type == HIT_ACTION ? m_hit_item & 3 : -1, states);
         } else if (!nonHoverText.IsEmpty()) {
             texts.Add(nonHoverText);