Ace of Diamonds, and ... Kaspersky

In the process of testing web preference , one strange detail suddenly emerged. About 5% of players consistently complained about the "lack of" cards. At the same time, thousands of other players (including developers), everything worked perfectly. In the process of debriefing, it became clear that every time the same card was missing. Namely - the diamond ace.
All tests the server was perfect. The code of a diamond ace was given to the client steadily with the rest of the cards. Casket, as is usually the case, opened very simply. The picture with a diamond ace in resources was called ad.gif . And these 5% of players were on guard of law and order ... Yes, yes, you were not mistaken, Yuri Antonov Kaspersky Internet Security, who did not like the name of the image file.
Moral for web developers is simple. When naming external resources (images, css, js, swf), pay attention to the absence of “suspicious” words and abbreviations (advertise, banner, ...). Perhaps it will save you and your users mental health.