Is your recent Drupal update not taking effect? Drupal still claims to be the
old version?

It is probably correct! There's at least one module on your system that claims it is 1) a core module and
2) old. How did this happen? Common scenarios are:

• You accidentally restored the old modules folder from a backup.
• You tried to overwrite the older install, but this failed for some reason (common on ftp).
• You made a backup of core modules inside the modules or sites folder.
• You copied a core module to sites/default/modules or sites/[site]/modules to override
  a core module.
• You are looking at the wrong server (embarrassing, but it happens).

Remember, Drupal prefers core files in sites/all/modules or sites/[site]/modules over
those in modules when it finds copies.

To identify the actual files in use, check the filename and info columns for core
modules in the system table. If you don't like touching your database, install the
Update: DOH! module. It will give you a list of filenames
and their versions.