You are right. 2.2.19 knfsd patch was incorrect. I had NFS hangs on a solaris 2.8 client. I saw these errors on the 2.2.20pre2 linux server. No, fses themselves should be intact.
Patch just puts wrong things into the inode cache.
SuSE 7.0 base install. Copyright 1999-2001 Open Source Development Network. All rights reserved.