Like many I am very frustrated at the drivel that gets posted on this forum of late - sic the Spanair thread.
Seems like waiting until 1200 today for MOL's next bulletin will be more informative. Here's what Ryanair themselves say - seems nicely factual and to the point - though I bet they know what component failure cuased the depressurisation.
Ryanair.com - Notice : Ryanair Aircraft diverts to Limoges 25 Aug- Updated 08.30hrs