Time zone issue in OS X 10.8

Question

JavaScript

In OS X 10.8, some time zones differ from those in other operating systems.

For example, the old MSD has a value of +2700 (!)

For this reason, the date count breaks:

var a = new Date(2010, 9, 1); // Fri Oct 01 2010 00:00:00 GMT+0400 (MSK)
a.setMonth(a.getMonth()+1); // Sun Oct 31 2010 01:00:00 GMT+0400 (MSK)

On Linux everything is ok:

var a = new Date(2010, 9, 1); // Fri Oct 01 2010 00:00:00 GMT+0500 (MSK)
a.setMonth(a.getMonth()+1); // Mon Nov 01 2010 00:00:00 GMT+0400 (MSK)

Have you encountered this problem?