[interchange] Update WHATSNEW.

[Peter Ajamian]

commit 1f29cab8371b05a5d402824f44f3dc7f1e1973b7
Author: Peter Ajamian <peter at pajamian.dhs.org>
Date:   Fri Dec 31 06:00:19 2010 +1300

    Update WHATSNEW.

 WHATSNEW-5.7 |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/WHATSNEW-5.7 b/WHATSNEW-5.7
index f33059a..ad0654b 100644
--- a/WHATSNEW-5.7
+++ b/WHATSNEW-5.7
@@ -16,6 +16,10 @@ Core
   browsers, regardless of any toolbar matches in the User Agent
   string.
 
+* If we are running an or search and not all of the specs have equivelant sql
+  specs (WHERE clauses) then don't try to optimize the query as doing so will
+  cause records to not be returned that might match other specs.
+
 Tags
 ----
 * Allow sorting of forum entries.