If you start sql server 2008 R2 and open or create a job step then save it then try to open any job step in any job then you will get an error.
It looks like this.
This is a bug in Management studio and is apparently caused by the dts.dll not being registered.
Use RegSrv32.exe to register the dll.
If like me you are using Windows 7 then use windows explorer to go to
find the cmd.exe file and right-click to choose “run as administrator”
then type this in to the window
cd C:\Program Files\Microsoft SQL Server\100\DTS\Binn
then regsrv32.exe dts.dll
hit return then restart Management studio. Might also need to restart sql, sql agent or the machine (depends on whats locked and loaded).