diff --git a/development/autotests/ctests-costs-benefits.txt b/development/autotests/ctests-costs-benefits.txt
index c7b2e3c1b1..fc39060ffa 100644
--- a/development/autotests/ctests-costs-benefits.txt
+++ b/development/autotests/ctests-costs-benefits.txt
@@ -49,6 +49,10 @@ Fix    : 39a9e370
 Report : https://www.mail-archive.com/search?l=mid&q=20210528001413.56phju7dvfn4dexs%40tallinn
 Fix    : ffa6a724
 
+Report : https://www.mail-archive.com/search?l=mid&q=20210529174524.idnmt5w4tvhuvyy6%40tallinn
+Note1  : We are still not sure what to do regarding how to make it more user-friendly
+         for users to realize that "-dALLOWPSTRANSPARENCY" is needed for the ps2pdf converter.
+
 
 Examples where upstream (e.g., LaTeX packages) bugs were fixed (more quickly)
 because of ctests: