Errors in the release candidate

I installed the most recent DEV to ward off other errors, and it seems to be working well. I do get these four errors now:

• warning: include_once(modules/date/theme/theme.inc) [function.include-once]: failed to open stream: No such file or directory in /home/saskcath/public_html/includes/theme.inc on line 286.
• warning: include_once() [function.include]: Failed opening 'modules/date/theme/theme.inc' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/sh/public_html/includes/theme.inc on line 286.
• warning: include_once(modules/date/theme/theme.inc) [function.include-once]: failed to open stream: No such file or directory in /home/saskcath/public_html/includes/theme.inc on line 286.
• warning: include_once() [function.include]: Failed opening 'modules/date/theme/theme.inc' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/sh/public_html/includes/theme.inc on line 286.