Index: C:/Users/jfs/Dev/Aegisub/vsfilter/subtitles/Rasterizer.cpp
===================================================================
--- C:/Users/jfs/Dev/Aegisub/vsfilter/subtitles/Rasterizer.cpp	(revision 2281)
+++ C:/Users/jfs/Dev/Aegisub/vsfilter/subtitles/Rasterizer.cpp	(revision 2282)
@@ -344,6 +344,7 @@
 
 	mOutline.clear();
 	mWideOutline.clear();
+	mWideBorder = 0;
 
 	// Determine bounding box
 
@@ -649,7 +650,9 @@
 	if(rx < 0) rx = 0;
 	if(ry < 0) ry = 0;
 
-	if (ry > 0 && rx > 0)
+	mWideBorder = max(rx,ry);
+
+	if (ry > 0)
 	{
 		// Do a half circle.
 		// _OverlapRegion mirrors this so both halves are done.
@@ -657,8 +660,7 @@
 		{
 			int x = (int)(0.5 + sqrt(float(ry*ry - y*y)) * float(rx)/float(ry));
 
-			// If x=0 nothing will be drawn for this overlap, not sure why
-			_OverlapRegion(mWideOutline, mOutline, max(x,1), y);
+			_OverlapRegion(mWideOutline, mOutline, x, y);
 		}
 	}
 	else if (ry == 0 && rx > 0)
@@ -668,8 +670,6 @@
 		_OverlapRegion(mWideOutline, mOutline, rx, 0);
 	}
 
-	mWideBorder = max(rx,ry);
-
 	return true;
 }