I've been developing yql applications all morning, (and yesterday) and suddenly my query has just stopped working:

SELECT message FROM ymail.msgcontent WHERE (fid,mids) IN (SELECT folder.folderInfo.fid,mid FROM ymail.messages WHERE numMId=10)

Even the default select statement which Yahoo provides is broken

SELECT message FROM ymail.msgcontent WHERE (fid,mids) IN (SELECT folder.folderInfo.fid,mid FROM ymail.messages WHERE query="Yahoo" LIMIT 1)

Anyone else experiencing this?