Here is the error that C5 is giving me when I try to access my stacks area.

mysql error: [145: Table './northg10_concrete5/PageSearchIndex' is marked as crashed and should be repaired] in EXECUTE("select p1.cID, pt.ctHandle from Pages p1 left join Pages p2 on (p1.cPointerID = p2.cID) left join PagePaths on (PagePaths.cID = p1.cID and PagePaths.ppIsCanonical = 1) left join PageSearchIndex psi on (psi.cID = if(p2.cID is null, p1.cID, p2.cID)) inner join CollectionVersions cv on (cv.cID = if(p2.cID is null, p1.cID, p2.cID) and cvID = (select cvID from CollectionVersions where cvIsApproved = 1 and cID = cv.cID)) left join PageTypes pt on pt.ctID = cv.ctID inner join Collections c on (c.cID = if(p2.cID is null, p1.cID, p2.cID)) inner join Stacks on Stacks.cID = p1.cID left join CollectionSearchIndexAttributes on (CollectionSearchIndexAttributes.cID = if (p2.cID is null, p1.cID, p2.cID)) where 1=1 and p1.cParentID = '87' and stType = '20' and cvIsApproved = '1' and (p1.cIsTemplate = 0 or p2.cIsTemplate = 0) and p1.cIsActive = '1' order by p1.cDisplayOrder asc ")

Anyone have any idea what this means, short of me having to re-load my database from a backup? Thanks for any help.