diff --git a/include/mapnik/text/dummy_shaper.hpp b/include/mapnik/text/dummy_shaper.hpp
index 15551f418..874f0d0db 100644
--- a/include/mapnik/text/dummy_shaper.hpp
+++ b/include/mapnik/text/dummy_shaper.hpp
@@ -82,7 +82,7 @@ static void shape_text(text_line & line,
             width_map[i] += tmp.advance();
             line.add_glyph(tmp, scale_factor);
         }
-        line.update_max_char_height(face->get_char_height());
+        line.update_max_char_height(face->get_char_height(size));
     }
 }
 
diff --git a/include/mapnik/text/face.hpp b/include/mapnik/text/face.hpp
index bc4ecff36..a0d807fa3 100644
--- a/include/mapnik/text/face.hpp
+++ b/include/mapnik/text/face.hpp
@@ -64,7 +64,7 @@ public:
         return face_;
     }
 
-    double get_char_height() const;
+    double get_char_height(double size) const;
 
     bool set_character_sizes(double size);
     bool set_unscaled_character_sizes();
diff --git a/include/mapnik/text/glyph_info.hpp b/include/mapnik/text/glyph_info.hpp
index ce59d5424..a8dc611c3 100644
--- a/include/mapnik/text/glyph_info.hpp
+++ b/include/mapnik/text/glyph_info.hpp
@@ -49,7 +49,7 @@ struct glyph_info
           unscaled_ymax(0.0),
           unscaled_advance(0.0),
           unscaled_line_height(0.0),
-          scale_multiplier(0.0),
+          scale_multiplier(1.0),
           offset(),
           format() {}
     glyph_index_t glyph_index;
@@ -68,8 +68,8 @@ struct glyph_info
     pixel_position offset;
     char_properties_ptr format;
 
-    double ymin() const { return floor(unscaled_ymin * scale_multiplier / y_scale); }
-    double ymax() const { return ceil(unscaled_ymax * scale_multiplier / y_scale); }
+    double ymin() const { return floor(unscaled_ymin * 64.0 * scale_multiplier / y_scale); }
+    double ymax() const { return ceil(unscaled_ymax * 64.0 * scale_multiplier / y_scale); }
     double height() const { return ymax() - ymin(); };
     double advance() const { return floor(unscaled_advance * scale_multiplier / x_scale); };
     double line_height() const { return floor(unscaled_line_height * scale_multiplier / y_scale); };
diff --git a/include/mapnik/text/harfbuzz_shaper.hpp b/include/mapnik/text/harfbuzz_shaper.hpp
index d607d2eef..cfdc8c6c8 100644
--- a/include/mapnik/text/harfbuzz_shaper.hpp
+++ b/include/mapnik/text/harfbuzz_shaper.hpp
@@ -110,14 +110,11 @@ static void shape_text(text_line & line,
                 //Overwrite default advance with better value provided by HarfBuzz
                 tmp.unscaled_advance = positions[i].x_advance * tmp.x_scale;
 
-                std::cerr << tmp.line_height() << ' ' <<
-                    tmp.advance() << '\n';
-
                 tmp.offset.set(positions[i].x_offset * tmp.scale_multiplier, positions[i].y_offset * tmp.scale_multiplier);
                 width_map[glyphs[i].cluster] += tmp.advance();
                 line.add_glyph(tmp, scale_factor);
             }
-            line.update_max_char_height(face->get_char_height());
+            line.update_max_char_height(face->get_char_height(size));
             break; //When we reach this point the current font had all glyphs.
         }
     }
diff --git a/include/mapnik/text/icu_shaper.hpp b/include/mapnik/text/icu_shaper.hpp
index 816ea4773..92df713e1 100644
--- a/include/mapnik/text/icu_shaper.hpp
+++ b/include/mapnik/text/icu_shaper.hpp
@@ -112,7 +112,7 @@ static void shape_text(text_line & line,
                 }
             }
             if (!shaped_status) continue;
-            line.update_max_char_height(face->get_char_height());
+            line.update_max_char_height(face->get_char_height(size));
             return;
         }
     }
diff --git a/src/text/face.cpp b/src/text/face.cpp
index 257c25616..05db9410e 100644
--- a/src/text/face.cpp
+++ b/src/text/face.cpp
@@ -36,12 +36,13 @@ font_face::font_face(FT_Face face)
 {
 }
 
-double font_face::get_char_height() const
+double font_face::get_char_height(double size) const
 {
     if (char_height_ != 0.0) return char_height_;
     glyph_info tmp;
     tmp.glyph_index = FT_Get_Char_Index(face_, 'X');
     glyph_dimensions(tmp);
+    tmp.scale_multiplier = size / face_->units_per_EM;
     char_height_ = tmp.height();
     return char_height_;
 }
@@ -96,7 +97,7 @@ void font_face::glyph_dimensions(glyph_info & glyph) const
 
     glyph.unscaled_ymin = glyph_bbox.yMin * glyph.y_scale;
     glyph.unscaled_ymax = glyph_bbox.yMax * glyph.y_scale;
-    glyph.unscaled_advance = face_->glyph->metrics.horiAdvance * glyph.x_scale;
+    glyph.unscaled_advance = face_->glyph->advance.x * glyph.x_scale;
     glyph.unscaled_line_height = face_->size->metrics.height * glyph.y_scale;
 
 //TODO:    dimension_cache_.insert(std::pair<unsigned, char_info>(c, dim));