I've just installed 1.4.6 after downloading it from sourceforge.
When I update the a page, I get this error
A database query syntax error has occurred. This may indicate a bug
in the software. The last attempted database query was:
(SQL query hidden)
from within function "LinkCache::preFill". MySQL returned error "1064:
You have an error in your SQL syntax near 'FOR UPDATE' at line 3
(mysql.webxess.net)".
Despite this, the page still updates correctly. Same happens with page creation.
Graham