diff --git a/mozilla/layout/reftests/bugs/428521-1-ref.html b/mozilla/layout/reftests/bugs/428521-1-ref.html
new file mode 100644
index 00000000000..62050a45cb9
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/428521-1-ref.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+The blue and green divs should be on the same line.
+
+
+
+
+
a
b
+
+
+
c
+
d
+
+
+
+
+
+
diff --git a/mozilla/layout/reftests/bugs/428521-1a.html b/mozilla/layout/reftests/bugs/428521-1a.html
new file mode 100644
index 00000000000..615c412bc38
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/428521-1a.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+The blue and green divs should be on the same line.
+
+
+
+
+
a
b
+
+
+
c
+
d
+
+
+
+
+
+
diff --git a/mozilla/layout/reftests/bugs/428521-1b.html b/mozilla/layout/reftests/bugs/428521-1b.html
new file mode 100644
index 00000000000..9f6a80f4dba
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/428521-1b.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+The blue and green divs should be on the same line.
+
+
+
+
+
a
b
+
+
+
c
+
d
+
+
+
+
+
+
diff --git a/mozilla/layout/reftests/bugs/428521-1c.html b/mozilla/layout/reftests/bugs/428521-1c.html
new file mode 100644
index 00000000000..6633fcc1ffc
--- /dev/null
+++ b/mozilla/layout/reftests/bugs/428521-1c.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+The blue and green divs should be on the same line.
+
+
+
+
+
a
b
+
+
+
c
+
d
+
+
+
+
+
+
diff --git a/mozilla/layout/reftests/bugs/reftest.list b/mozilla/layout/reftests/bugs/reftest.list
index 177bde52e78..1683a8f5efb 100644
--- a/mozilla/layout/reftests/bugs/reftest.list
+++ b/mozilla/layout/reftests/bugs/reftest.list
@@ -812,5 +812,8 @@ fails-if(MOZ_WIDGET_TOOLKIT=="gtk2") == 424074-1-ref2.xul 424074-1-ref3.xul
== 427730-1.html 427730-1-ref.html
== 428423-1a.html 428423-1-ref.html
== 428423-1b.html 428423-1-ref.html
+== 428521-1a.html 428521-1-ref.html
+== 428521-1b.html 428521-1-ref.html
+== 428521-1c.html 428521-1-ref.html
== 430412-1.html 430412-1-ref.html
diff --git a/mozilla/layout/tables/BasicTableLayoutStrategy.cpp b/mozilla/layout/tables/BasicTableLayoutStrategy.cpp
index cfd0e78e930..fdbd99ddc06 100644
--- a/mozilla/layout/tables/BasicTableLayoutStrategy.cpp
+++ b/mozilla/layout/tables/BasicTableLayoutStrategy.cpp
@@ -774,8 +774,7 @@ BasicTableLayoutStrategy::DistributeWidthToColumns(nscoord aWidth,
float f;
} basis; // the sum of the statistic over columns to divide it
if (aWidth < guess_pref) {
- if ((aWidthType == BTLS_MIN_WIDTH && aWidth <= guess_min) ||
- (aWidthType == BTLS_PREF_WIDTH && aWidth <= guess_pref)) {
+ if (aWidthType != BTLS_FINAL_WIDTH && aWidth <= guess_min) {
// Return early -- we don't have any extra space to distribute.
return;
}