Fix #1516986: Add a comment about empty shadow breaking IE to the .ini files.

markers/colors.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29
@@ -43,4 +45,4 @@ sequence = "white.png"
 name = "Yellow"
 sequence = "yellow.png"
 
-; Files
+; Files
\ No newline at end of file

markers/days.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29
@@ -40,4 +42,4 @@ sequence = "marker_saturday.png"
 name = "Week"
 sequence = "marker_sunday.png,marker_monday.png,marker_tuesday.png,marker_wednesday.png,marker_thursday.png,marker_friday.png,marker_saturday.png"
 
-; Files
+; Files
\ No newline at end of file

markers/letters.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29
@@ -11,4 +13,4 @@ infoY = 6
 name = "Letters"
 sequence = "letter1.png,letter2.png,letter3.png,letter4.png,letter5.png,letter6.png,letter7.png,letter8.png,letter9.png,letter10.png"
 
-; Files
+; Files
\ No newline at end of file

markers/misc.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29

markers/numbers.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29
@@ -11,4 +13,4 @@ infoY = 6
 name = "Numbers"
 sequence = "number1.png,number2.png,number3.png,number4.png,number5.png,number6.png,number7.png,number8.png,number9.png,number10.png,number11.png,number12.png,number13.png,number14.png,number15.png,number16.png,number17.png,number18.png,number19.png,number20.png,number21.png,number22.png,number23.png,number24.png,number25.png,number26.png"
 
-; Files
+; Files
\ No newline at end of file

markers/route.ini

 ; Defaults
 [defaults]
+; Note: An empty shadow property will break IE.
+; Leave it commented out if you aren't supplying an image.
 ;shadow = ""
 anchorX = 10
 anchorY = 29
@@ -11,4 +13,4 @@ infoY = 6
 name = "Route"
 sequence = "route1.png,route2.png"
 
-; Files
+; Files
\ No newline at end of file