If you see the file create time or last modified time changed by one hour after the recent Daylight Saving Time ended. That is normal, according to Microsoft:

http://support.microsoft.com/kb/129574

Example: If you have an IIS log file which has the last modification time of 12:00AM, October 31, 2007. After the Daylight Saving Time ended last weekend, the last modification time becomes 11:00PM, October 30, 2007, if the file system is NTFS, why ?

This is by design in Windows Systems. In NTFS, the file time is a 64-bit integer recording the UTC time since Jan 1st, 1601 A.D. It is the value which does not change with the Time Zone or Daylight Saving Time. However, when you view this file from Different time zone/daylight saving time, you will see different results.

However, if your file system is FAT, it only records the local time with no time zone information. So if you save a file at 3:00PM, PT today, the person at East Coast will see the last modified time is 3:00PM, ET today. But if you are using NTFS, the East Coast person will see the last modified time as 6:00PM, ET today.