The word document icon issue has been going on for a while (you are probably seeing the "wordpad" default icon for a ".doc" file).
I have not heard back yet, but this one in particular is being pulled from the "WindowsNT\Accessories" sub-directory, and may be set that way because not all people run Microsoft Word.
I sent a screenshot of the correct and incorrect icons to Tech Support, so hopefully these issues will be addressed soon.
In the meantime, you can do the following:
Open "My Computer" > Tools > Folder Options > File Types tab > select the file type you want to work with > click "Advanced" button > Click "Change Icon" button > navigate to the icon you want assigned to that file type.
In the case of the Word document, navigate to the Word ".exe" file (for Office XP, it is found in "C:\Program Files\Microsoft Office\Office10" folder) - open the executible file and you will see the icons available for assignment.
Repeat for any other icons that show this type of issue.
You might also send an e-mail to: email@example.com to give them a heads-up that it is a frequent issue with many users.