Actually the problem was on the steering! The system seems to be quite sensible on EMB145: steering INOP messages are very common!
The problem was that this time there was no message and the steering was INOP when the landing gear came out so the front wheel was not straight as it should have been. The pilot had no chance to notice that!
At touch down, the a/c went right, then the pilot disconnected the INOP steering ! So no guiding was possible and the a/x went straight into the grass. Thats it! No reverse reverse problem or so but more lightly a fussy bug in the steering sofware!!
Info to Duke: Maybe you should follow the evolution in Europe concerning certification and EASA! Then you would probably know that EASA is now responsible through european law to issue AD's and follow the certification of european registered a/c. The surveillance of EMB145 has been delegated by EASA to the JAA. They visibly did not their job because a lot of steering incidents have been reported by a lot of companies on EMB145, but the JAA never took any action on the type certificate holder.
By the way, the event has of course been classified as "Accident".