Hello Wolfgang,
According to the development team, the 'TextAndImageRelation’ property exists in C1Ribbon for backward compatibility only. This property was removed in in build 2.0.20091.149 (it is not necessary since the button elements can be aligned dynamically, depending on the owner group sizing). However, there was a lot of complains from users who adjusted their layouts based on the previous behavior of C1Ribbon. So, the property was readded in build 2.0.20093.221.
The ImageAboveText and ImageBeforeText modes have the same effect as in very first versions of C1Ribbon. As a result, the UI of very old user applications is still not broken.
In the new applications you should never set this property to any values except Automatic.
Let me know if this helps.
Thanks,
Richa