Index: source/gui/COList.h
===================================================================
--- source/gui/COList.h
+++ source/gui/COList.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2016 Wildfire Games.
+/* Copyright (C) 2017 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -25,11 +25,10 @@
  */
 struct COListColumn
 {
-  CColor m_TextColor;
-  CStr m_Id;
-  float m_Width;
-  CStrW m_Heading;
-
+	CColor m_TextColor;
+	CStr m_Id;
+	float m_Width;
+	CStrW m_Heading;
 };
 
 /**
@@ -60,6 +59,8 @@
 
 	virtual CRect GetListRect() const;
 
+	float GetColumnWidth(const COListColumn& column) const;
+
 	/**
 	 * Available columns.
 	 */
@@ -68,6 +69,7 @@
 private:
 	// Width of space available for columns
 	float m_TotalAvailableColumnWidth;
+	float m_TotalAvailableRelativeColumnWidth;
 };
 
 #endif // INCLUDED_COLIST
Index: source/gui/COList.cpp
===================================================================
--- source/gui/COList.cpp
+++ source/gui/COList.cpp
@@ -66,12 +66,28 @@
 	if (scrollbar && GetScrollBar(0).GetStyle())
 		width -= GetScrollBar(0).GetStyle()->m_Width;
 
-	m_TotalAvailableColumnWidth = width;
+	m_TotalAvailableRelativeColumnWidth = m_TotalAvailableColumnWidth = width;
+	float total_sum = 0.f;
+	for (const COListColumn& column : m_Columns)
+	{
+		bool hidden = false;
+		GUI<bool>::GetSetting(this, "hidden_" + column.m_Id, hidden);
+		if (hidden)
+			continue;
+		if (column.m_Width < 1)
+			total_sum += column.m_Width;
+		else
+			m_TotalAvailableRelativeColumnWidth -= column.m_Width;
+	}
+	// In normal case total_sum should be equal to 1.0 (all columns in total give 100%)
+	// So normalize availabe relative width
+	if (total_sum > 0.f)
+		m_TotalAvailableRelativeColumnWidth /= total_sum;
 
 	float buffer_zone = 0.f;
 	GUI<float>::GetSetting(this, "buffer_zone", buffer_zone);
 
-	for (COListColumn column : m_Columns)
+	for (const COListColumn& column : m_Columns)
 	{
 		SGUIText* text = new SGUIText();
 		CGUIString gui_string;
@@ -155,17 +171,14 @@
 		GUI<float>::GetSetting(this, "heading_height", headingHeight);
 
 		float xpos = 0;
-		for (COListColumn column : m_Columns)
+		for (const COListColumn& column : m_Columns)
 		{
 			bool hidden = false;
 			GUI<bool>::GetSetting(this, "hidden_" + column.m_Id, hidden);
 			if (hidden)
 				continue;
 
-			float width = column.m_Width;
-			// Check if it's a decimal value, and if so, assume relative positioning.
-			if (column.m_Width < 1 && column.m_Width > 0)
-				width *= m_TotalAvailableColumnWidth;
+			float width = GetColumnWidth(column);
 			CPos leftTopCorner = m_CachedActualSize.TopLeft() + CPos(xpos, 0);
 			if (mouse.x >= leftTopCorner.x &&
 				mouse.x < leftTopCorner.x + width &&
@@ -400,11 +413,7 @@
 		if (hidden)
 			continue;
 
-		// Check if it's a decimal value, and if so, assume relative positioning.
-		float width = m_Columns[col].m_Width;
-		if (m_Columns[col].m_Width < 1 && m_Columns[col].m_Width > 0)
-			width *= m_TotalAvailableColumnWidth;
-
+		float width = GetColumnWidth(m_Columns[col]);
 		CPos leftTopCorner = m_CachedActualSize.TopLeft() + CPos(xpos, 0);
 
 		// Draw sort arrows in colum header
@@ -468,10 +477,7 @@
 			// Determine text position and width
 			const CPos textPos = rect.TopLeft() + CPos(xpos, -scroll + m_ItemsYPositions[i]);
 
-			float width = m_Columns[col].m_Width;
-			// Check if it's a decimal value, and if so, assume relative positioning.
-			if (m_Columns[col].m_Width < 1 && m_Columns[col].m_Width > 0)
-				width *= m_TotalAvailableColumnWidth;
+			float width = GetColumnWidth(m_Columns[col]);
 
 			// Clip text to the column (to prevent drawing text into the neighboring column)
 			CRect cliparea2 = cliparea;
@@ -484,3 +490,10 @@
 		}
 	}
 }
+
+float COList::GetColumnWidth(const COListColumn& column) const
+{
+	// Check if it's a decimal value, and if so, assume relative positioning.
+	return column.m_Width < 1 && column.m_Width > 0 ?
+		column.m_Width * m_TotalAvailableRelativeColumnWidth : column.m_Width;
+}