_vpi.xml not found errors everywhere

Hi,

i got a lot of "_vpi.xml page not found errors" in the log.

I dont see any faulty behaviour.
Any hints where they are coming from?

Using the following:

Drupal Aktuell 5.1 5.1 (2007-Jan-30) drupal-5.1.tar.gz
Beinhaltet: Aggregator, Block, Color, Comment, Contact, Filter, Help, Locale, Menu, Node, Path, Ping, Profile, Search, Statistics, System, Taxonomy, Throttle, Upload, User, Watchdog
captcha Aktuell 5.x-2.1 5.x-2.1 (2007-Mai-11) captcha-5.x-2.1.tar.gz
Beinhaltet: Captcha
Form store Aktuell 5.x-1.0 5.x-1.0 (2007-Mai-28) form_store-5.x-1.0.tar.gz
Beinhaltet: Form store
Google Analytics Aktuell 5.x-1.2 5.x-1.2 (2007-Mai-04) google_analytics-5.x-1.2.tar.gz
Beinhaltet: Google Analytics
XML Sitemap Aktuell 5.x-1.10 5.x-1.10 (2007-Mai-08) gsitemap-5.x-1.10.tar.gz
Beinhaltet: XML Sitemap
Image Aktuell 5.x-1.1 5.x-1.1 (2007-Mai-02) image-5.x-1.1.tar.gz
Beinhaltet: Image Attach, Image Gallery, Image Import, Image
Lightbox V2 Aktuell 5.x-1.1 5.x-1.1 (2007-Mai-04) lightbox2-5.x-1.1.tar.gz
Beinhaltet: Lightbox2
Pathauto Aktuell 5.x-1.1 5.x-1.1 (2007-Mär-20) pathauto-5.x-1.1.tar.gz
Beinhaltet: Pathauto
Poormanscron Aktuell 5.x-1.1 5.x-1.1 (2007-Jan-20) poormanscron-5.x-1.1.tar.gz
Beinhaltet: Poormanscron
Textimage Aktuell 5.x-1.2 5.x-1.2 (2007-Feb-06) textimage-5.x-1.2.tar.gz
Beinhaltet: Text Image
Update status Aktuell 5.x-1.2 5.x-1.2 (2007-Apr-14) update_status-5.x-1.2.tar.gz

Garland as theme with colours changed.

Enabled from base is:
Aggregator
Color
Comment
Contact
Help
Locale
Menu
Path
Ping
Profile
Search
Statistics
Taxonomy
Throttle
Upload

GD-Bibliothek bundled (2.0.28 compatible)
MySQL-Datenbank 5.0.26
PHP 4.4.7
Unicode-Bibliothek PHP mbstring-Erweiterung
Webserver Apache/1.3.33 (Unix)

The site is: http://site.rusch.name/

Some other probles might be signs what is going wrong. See:
http://drupal.org/node/148284
and
http://drupal.org/node/148281

Thanks for any help.