Thank you Martin too ! I was able to trace the problem: it was due to a 500 error when people were using the "Add to your favorites" button on my Web site (http://www.vehicall.com) with Firefox...
Sorry for the disturb, Germain -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.410 / Virus Database: 268.17.12/655 - Release Date: 28.01.2007
