diff --git a/Packages/Installation/changes.txt b/Packages/Installation/changes.txt
index 3f2218c7b5b..940fd3301ee 100644
--- a/Packages/Installation/changes.txt
+++ b/Packages/Installation/changes.txt
@@ -42,6 +42,9 @@ DOCS: removed support for "external" STL
 DOCS: removed obsolete paragraph about LEDA/STL problems
 DOCS: updated upgrade section.
 DOCS: updated list of supported compilers.
+DOCS: added section "Compiler Optimisations"
+DOCS: added long-name-problem remarks to Troubleshooting
+DOCS: moved leda-stl-conflict subsection to Troubleshooting
 SRC : fixed IA workaround_irix naming.
 SRC : added rule for compiling the intervall-arithmetic workaround_4_irix.
 SRC : added CGAL_EXTRA_OBJECTS to lib makefiles (Intervall_arithmetic fix
diff --git a/Packages/Installation/long_description.txt b/Packages/Installation/long_description.txt
index d26ff12723e..d5e14b7c668 100644
--- a/Packages/Installation/long_description.txt
+++ b/Packages/Installation/long_description.txt
@@ -3,6 +3,14 @@
 //=====================================================================
 
 
+//---------------------------------------------------------------------
+//	revision 1.46
+//---------------------------------------------------------------------
+
+DOCS: added section "Compiler Optimisations"
+DOCS: added long-name-problem remarks to Troubleshooting
+DOCS: moved leda-stl-conflict subsection to Troubleshooting
+
 //---------------------------------------------------------------------
 //	revision 1.45
 //---------------------------------------------------------------------
diff --git a/Packages/Installation/version b/Packages/Installation/version
index 2cdf82bf5c1..3651e1844ab 100644
--- a/Packages/Installation/version
+++ b/Packages/Installation/version
@@ -1 +1 @@
-1.45 (25 May 1999)
+1.46 (09 June 1999)