Questions/oddities found when I upgraded to maverick

[Tom Masterson]

I upgraded yesterday using do-release-upgrade as recommended on the 
upgrade page.  now when I log in to the console I get two welcome messages 
one for Ubuntu 10.10 and one for Ubuntu 10.04.1 LTS.  Is this correct or 
is there a problem with my system?

Also since I have upgraded I am getting the following php5 error whenever 
the cron job for removing old sessions is run.

PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/cli/conf.d/mhash.ini on line 1 in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626+lfs/mhash.so' - /usr/lib/php5/20090626+lfs/mhash.so: cannot open shared object file: No such file or directory in Unknown on line 0

Thanks in advance for any help.
Tom