I couldn't do anything using my browser.  I had to go into my website control panel (not piwigo's) and access the php databases there.  Once in, I was able to get to the plugins database and set them as inactive.

It was pretty hairy for a while. *lol*

Thank  you everyone for the replies.

lisaviolet - I saw your thread (http://piwigo.org/forum/viewtopic.php?pid=120533)  but  could not follow the advice given.

n0kS - ContactFrom is one of the plugins that I reactivated without problems before the system bombed out.

After log out I now get the following on trying to log in again:
Cookies are blocked or not supported by your browser. You must enable cookies to log in.

Using phpMyAdmin:

plg - Something seems to have thrashed the database. It is full of EMPTY!?

Will attempt to do
update piwigo_plugins set state = 'inactive';
now, if I can find it.

After that, and if it does not work, I will restore the old database and see what happens.

maeztro wrote:

Website at: http://gallery.chaos.co.za/

Upgraded installation.
Re-activated plugins.
After activating one of the plugins (have not a clue anymore which one) I can not logout/in  anymore.

I just get the following error:
Warning:  [mysql error 1054] Unknown column 'I.adviser' in 'where clause'

select
  U.username as username,
  U.mail_address as mail_address
from
  pwg_users as U,
  pwg_user_infos as I
where
  I.user_id =  U.id and
  I.status in ('webmaster',  'admin') and
  I.adviser = 'false' and
  mail_address is not null
order by
  username
in /<removed path>/include/dblayer/functions_mysql.inc.php on line 654


Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at
/<removed path>/include/dblayer/functions_mysql.inc.php:653) in /<removed path>/include/user.inc.php on line 29

Warning: Cannot modify header information - headers already sent by (output started at
/<removed path>/include/dblayer/functions_mysql.inc.php:653) in
/<removed path>/include/page_header.php on line 98

Tried following advice as given elsewhere (http://piwigo.org/forum/viewtopic.php?pid=120533), but can't find the place to deactivate anything in the database.

Any clues?

Hello, the problem is the plugin ContactFrom. Please deactivate this plugin to fix your problem.

Website at: http://gallery.chaos.co.za/

Upgraded installation.
Re-activated plugins.
After activating one of the plugins (have not a clue anymore which one) I can not logout/in  anymore.

I just get the following error:
Warning:  [mysql error 1054] Unknown column 'I.adviser' in 'where clause'

select
  U.username as username,
  U.mail_address as mail_address
from
  pwg_users as U,
  pwg_user_infos as I
where
  I.user_id =  U.id and
  I.status in ('webmaster',  'admin') and
  I.adviser = 'false' and
  mail_address is not null
order by
  username
in /<removed path>/include/dblayer/functions_mysql.inc.php on line 654


Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at
/<removed path>/include/dblayer/functions_mysql.inc.php:653) in /<removed path>/include/user.inc.php on line 29

Warning: Cannot modify header information - headers already sent by (output started at
/<removed path>/include/dblayer/functions_mysql.inc.php:653) in
/<removed path>/include/page_header.php on line 98

Tried following advice as given elsewhere (http://piwigo.org/forum/viewtopic.php?pid=120533), but can't find the place to deactivate anything in the database.

Any clues?