Bug #10261 INFORMATION_SCHEMA.COLUMNS, incomplete result for non root user

Description:
A non root user is not able to get informations about the 
columns of the INFORMATION_SCHEMA tables via
    SELECT .... FROM INFORMATION_SCHEMA.COLUMNS
    The result set does not contain any record for the tables
          INFORMATION_SCHEMA.COLUMNS, 
          INFORMATION_SCHEMA.TABLES ...
though he is for example able to get informations about 
the columns of  INFORMATION_SCHEMA.TABLES via
     SELECT ... FROM INFORMATION_SCHEMA.TABLES   or
     DESCRIBE INFORMATION_SCHEMA.TABLES;
     
My environment:
   - Intel PC with Linux(SuSE 9.1)
   - MySQL compiled from source
        Version 5.0 ChangeSet@1.1914, 2005-04-29

I have the strong feeling, that this bug was introduced by 
changes made around 5. April. That's the day where 
several NIST INFORMATION_SCHEMA tests started to show 
many changed and sometimes clear wrong results. 

How to repeat:
Please use the attached test case ml62.test  with
same additional statements/observations.
  copy it to mysql-test/t
  touch r/ml62.result     # Produce a dummy file with 
                                   # expected results
  ./mysql-test-run ml62
  inspect r/ml62.reject    # The protocol of the execution.

test case with comments

Attachment: ml62.test (application/test, text), 1.20 KiB.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/internals/24659

Fixed in 5.0.6 tree

Noted in 5.0.6 changelog.