Upgrading Drupal

Can a database created in 6.1 work with a 6.2 install on a separate server?

Many module developers does not implement or skip their module variables delete o their module.install files of;

db_query(DELETE FROM {variable} WHERE name LIKE '%s_%%', 'module_X');

as such (module issues are full of reminders and patches waiting to be implemented)

An average site devopement there are many modules installed and uniztalled on the process leaving behind unused variables that might cause a overhead.

Is there a maintenance module that capable to delete and clean uninstalled modules?

Hello! I just upgraded my drupal to 6.12. Now I want to create a new tab under user/%user/edit/. When I press the new tab writer, other tabs disappear.

Can anyone help?

My Code:
function new_menu() {
$items = array();
$items['user/%user/edit/new'] = array(
'title' => 'New',
'page callback' => 'new_all',
'access arguments' => array('access content'),
'type' => MENU_LOCAL_TASK, 'weight' => 2,
'tab_parent' => 'user/%/edit',
);
return $items;
}

I had to upgrade one of my sites from D5 to D6 and that meant upgrading my data base from mysql 4 to 5

I was happy to reorganise the site in the process but now I need to copy over old users to the new site

Can anyone advise me?

I used to be able to have virtually any number of modules attached with lower versions but now 'modules' wont open if I have more than a very few installed

1and1 say nothing has changed by them

Anyone else had this problem?

According to my "Available Updates" page, I have a couple modules that now have newer versions. I've searched the documentation and used search, but haven't found any process for updating outdated modules.

Is this simply because the process is as simple as deleting the old module from the sites/all/modules directory and uploading the new one? Or is this more complex? Please inform - thanks!