[support] was Sup Dig 106. Now:Found what breaks drupal7

[Roger]

Copying a drupal default theme to /sites/all/themes/ and rework the 
.info, template.php and theme-settings.php as per tutorial and all works 
- until!

Until one inserts the line base theme = garland or base theme = new name 
into the .info file of the new renamed .info.
Bingo drupal is dead, no access to the system because there's no theme.

It does not default to (Seven) the admin theme.
Most peculiar that drupal can eliminate access because of a line in the 
.info file.
If the offending line is commented out, deleted or changed to garland, 
drupal still dead.

It seems that drupal reads the multi site .info once and saves a change 
to somewhere in the database then does not re read the .info file
To fix: Needs a fresh install of that particular multi site.

So if someone changes the .info file it kills drupal 7! This needs 
serious attention.
It is inconceivable that something as innocuous as the .info file can be 
so destructive.

Cheers
Roger