Are you using the latest version of SFML (the C++ version which gets used by the CSFML wrapper)? This issue has been fixed in master, so you might want to upgrade.I use the SFML Binaries provided by SFML.Net package (in /ext/lib) on Windows, and on Linux the standard package of SFML 2.1. Was the bug fixed in 2.1 already, or is the fix in the master branch beyond version 2.1?