79b016d915
The short explanation is that Drupal uses a lot of numeric deltas in the block system; blocks are identified by the 'module' and the 'delta'. In early Drupal, delta was numeric, but somewhere along the line it was changed to be possibly a string. In modern Drupal, block overrides are easily done via block-MODULE-DELTA.tpl.php. The primary motivation to switch to string IDs everywhere is to make these deltas friendlier to themers:
block-user-0.tpl.php --> block-user-navigation.tpl.php
block-user-1.tpl.php --> block-user-login.tpl.php
You get the picture.
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| .. | ||
| bluemarine | ||
| chameleon | ||
| engines/phptemplate | ||
| garland | ||
| pushbutton | ||
| README.txt | ||
README.txt
This directory is reserved for core theme files. Custom or contributed
themes should be placed in their own subdirectory of the sites/all/themes
directory. For multisite installations, they can also be placed in a subdirectory
under /sites/{sitename}/themes/, where {sitename} is the name of your site
(e.g., www.example.com). This will allow you to more easily update Drupal core files.
For more details, see: http://drupal.org/node/176043