Cannot finish upgrade to latest version, loop during upgrade

Hello,
i'm just writing my previous issue in a different way.

Today i upgraded my site to drupal 5.7 and i upgraded all other contrib modules.

I did the upload of date and calendar from the latest official release to the dev release.

I had problem during DATE upgrade because it was never ending. Going to upgrade.php?op=error page, i discovered the next log:

date module
Update #5203

    * Date data integrity check. Total nodes checked: 5
      Updated nodes:
      Unchanged nodes: 19, 19, 19, 21, 21
      Date Computations:
      19 > Value: 2008-02-14T09:05:00
      19 > Value: 2008-02-14T09:05:00
      19 > Value: 2008-02-14T09:05:00
      21 > Value: 2008-02-19T05:30:00
      21 > Value: 2008-02-19T05:30:00
    * Date data integrity check. Total nodes checked: 10
      Updated nodes:
      Unchanged nodes: 25, 25, 25, 26, 26
      Date Computations:
      25 > Value: 2008-02-15T05:30:00
      25 > Value: 2008-02-15T05:30:00
      25 > Value: 2008-02-15T05:30:00
      26 > Value: 2008-02-20T06:00:00
      26 > Value: 2008-02-20T06:00:00
    * Date data integrity check. Total nodes checked: 15
      Updated nodes:
      Unchanged nodes: 27, 28, 28, 29, 30
      Date Computations:
      27 > Value: 2008-02-15T07:00:00
      28 > Value: 2008-02-21T06:30:00
      28 > Value: 2008-02-21T06:30:00
      29 > Value: 2008-02-20T05:30:00
      30 > Value: 2008-02-20T06:00:00
    * Date data integrity check. Total nodes checked: 19
      Updated nodes:
      Unchanged nodes: 31, 31, 31, 34
      Date Computations:
      31 > Value: 2008-02-22T12:00:00
      31 > Value: 2008-02-22T12:00:00
      31 > Value: 2008-02-22T12:00:00
      34 > Value: 2008-02-06T05:30:00
    * Date data integrity check. Total nodes checked: 19
      Updated nodes:
      Unchanged nodes:
      Date Computations:
    * Date data integrity check. Total nodes checked: 19
      Updated nodes:
      Unchanged nodes:
      Date Computations:

and so on...

I looked into the date.install module and i saw something that could be the problem. What do you suggest?