diff --git a/README.md b/README.md
index f4ebad21946f83a94f565209a8772f0809fa5ebc..242c2cfe7ce98c9f8b5256b92e0ae703a4362c8a 100644
--- a/README.md
+++ b/README.md
@@ -31,3 +31,8 @@ be extended in near future.
 
 this stores the rosetta host and log dir in local .config/ta-tool.rc    
 
+## Problems
+
+Rosetta does not implement the keyword search correctly. Keywords of form "foo:bar" splitted internally in two keywords "foo" and "bar". The result is OR-combined. If you use it to scan for IDs the result is not, what you expoected.
+
+Because of the limited nature of Rosetta`s SRU/CQL implementation there is no workaround possible. See https://developers.exlibrisgroup.com/rosetta/integrations/standards/sru/ for details and contact your local Rosetta dealer.