False DragDrop.B Trojan detected by Microsoft Security Essentials in a JavaScript code in Catalan

When you get a virus warning message, you should always care about it, but sometimes it may happen that the detection is incorrect and therefore it is convenient the availability of more than one antivirus software.

I will tell you a strange recent example that we found:

If you have installed the Microsoft Security Essentials, and you create a file "code.js" (JavaScript) containing the exact text:

ClickSobreSituacio function (event_de_clic)
{
    PortamAPunt (DonaCoordXDeCoordSobreSituacio (event_de_clic.clientX) DonaCoordYDeCoordSobreSituacio (event_de_clic.clientY));
}

You will receive a warning message saying that a Trojan virus called "DragDrop.B" is about to devour you and that it must be removed immediately.
If you ask for more information on the Microsoft website to find exactly what can happen, you will not get much more information:

You do not need much knowledge of JavaScript to see that the code is written entirely in Catalan, and therefore is unlikely to contain that virus. If you know a little more, you'll see that the code defines a function and does not contain a command to run it. In the case you are able to run it from another place, it will not work either, because this piece of code is incomplete and lacks the definition of 2 additional functions.

The most curious of all is that only a small variation in the code makes the message disappear:
ClickSobreSituacio function (event_de_click)
{
    var x = DonaCoordXDeCoordSobreSituacio (event_de_click.clientX);
    var y = DonaCoordYDeCoordSobreSituacio (event_de_click.clientY);
    PortamAPunt (x, y);
}
As a programmer I very much appreciate the efforts of antivirus developers, but when they are erroneously detected, they can stain the work done for months to create, in this case a web application, and, when presenting it publicly, they can discredit it without reason.

Joan Masó

Information

List of antivirus that does not have this incorrect detection:
* Panda Internet Security
* Symantec
* Office Scan
* McAfee
* AVG
* Avast

Microsoft Security Essentials version that presents the problem: 18/02/2012 version 1.119.2238.0.