Upgrading Drupal

I was trying to updated drupal6.19 to 6.20 but it won't update. I use the custom theme that I bough. I used to update drupal 6.16 to 6.19 and it was working.

I'm not sure what the exactly problem. But my website has something wired. It has a duplicated drupal folder. The path is

drupal-6.19/sites/all/modules/drupal6.19

Hi all men !!

I have recently switched a test site from drupal 6.20 to 7.0.

After the upgrade, sometimes (yes, not always), I get these notices:

Should I upgrade my BIG multi sites installation from D6 to D7 ?

the pros and cons !

Hi!

I followed this article to upgrade from 6.20 to 7.0:
http://drupal.org/documentation/upgrade/6/7

Evereything seems to happen correctly but at the very and of upgrade, when I try to connect to mysite.com/admin with user UID1, the "tasks" panel tells me I don't have any permissions for admin section.

Am I support to unset every roles given to UID1 from drupal 6.20? (I had created the admin role for user UID1 and some other users).
Isn't the user 1 suppose to have every access??

Hello upgraded to Drupal 7 and my phpmailer / smtp / galleries is not working properly. Please register on my site "http://www.technokriti.in" and when you receive email from phpmailer..it will contain fields like !username and !password and !login_url ..but not the values.....What is the possible solution?

Everything was perfect in drupal 6.2

My upgrade went great until I received the following error. Any assistance would be greatly appreciated.

(done)Overview(done)Review updates(done)Run updates(done)Review log(done)Error messageNotice: unserialize() [function.unserialize]: Error at offset 112 of 337 bytes in variable_initialize() (line 749 of /home/xxxxxxxx/public_html/includes/bootstrap.inc).
Updates were attempted. If you see no failures below, you may proceed happily to the administration pages. Otherwise, you may need to update your database manually. All errors have been logged.