COMMISSION DECISION of 31 May 2006 relating to a proceeding under Article 81 of the Treaty establishing the European Community and Article 53 of the EEA Agreement (Case No COMP/F/38.645 — Methacrylates) (notified under document number C(2006) 2098) (Only the English and French texts are authentic) (Text with EEA relevance) (2006/793/EC)