[wp-testers] 2.9 beta 2 duplicate entry DB errors

[Kirk M]

I have WP 2.9 beta 2 running on two non-essential sites and I'm getting 
two "duplicate entry" DB errors on both sites, related to themes. 
Different themes on both sites of course but the errors seem to apply to 
all installed themes including the default and classic theme. Here's a 
sample from one of the sites (all errors are the same across both sites 
with the exception of the a couple theme name):

[12-Dec-2009 15:27:56] WordPress database error Duplicate entry 
'_site_transient_timeout_theme_roots' for key 2 for query INSERT INTO 
`options` (`option_name`,`option_value`,`autoload`) VALUES 
('_site_transient_timeout_theme_roots','1260638876','yes') made by 
require, require_once, require_once, require_once, 
get_template_directory, get_theme_root, get_theme_roots, get_themes, 
set_site_transient, add_site_option, add_option

[12-Dec-2009 15:27:56] WordPress database error Duplicate entry 
'_site_transient_theme_roots' for key 2 for query INSERT INTO `options` 
(`option_name`,`option_value`,`autoload`) VALUES 
('_site_transient_theme_roots','a:5:{s:13:\"amazing-grace\";s:7:\"/themes\";s:10:\"blue-grace\";s:7:\"/themes\";s:23:\"carrington-mobile-1.0.2\";s:7:\"/themes\";s:7:\"classic\";s:7:\"/themes\";s:7:\"default\";s:7:\"/themes\";}','yes') 
made by require, require_once, require_once, require_once, 
get_template_directory, get_theme_root, get_theme_roots, get_themes, 
set_site_transient, add_site_option, add_option

Can anyone give me a clue as to what's going on?