The Attachment Trigger is not firing for *before insert* and *after insert* events when attachments are added via the UI, is this a bug?  I've reviewed the known issues site and couldn't find anything similar.  However, I did find others having issues with this same Trigger in the past (some reporting that the issue was resolved?).  Can anyone shed some light on this?

Here is a quick example for before insert:

Apex Trigger:

    trigger Attachment_Trigger on Attachment (before insert) {
        if(Trigger.isBefore)
        {
            if(Trigger.isInsert)
            {
                Attachment_BI_Add_Test.testChanges(Trigger.new);
            }
        }
    }  


Apex Class:

    public class Attachment_BI_Add_Test {
    	
    	public static void testChanges(Attachment[] newAttachments)
        {                
            for(Attachment a : newAttachments)
            { 
                a.name = 'test';
                a.Description = 'test';
            }
        } 
    }

Other resources found with similar issues:

 - [http://corycowgill.blogspot.com/2010/12/salesforce-winter-10-attachment-trigger.html][1]

 - [http://boards.developerforce.com/t5/Apex-Code-Development/Attachment-Trigger-Not-Firing/m-p/591659/highlight/false#M108460][2]

 - [http://boards.developerforce.com/t5/Apex-Code-Development/Trigger-after-insert-an-Attachment/m-p/70211#M4073][3]

I've also checked the docs for operations that don't invoke triggers however, attachments are not mentioned:

 - [http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#StartTopic=Content/apex_triggers_ignoring_operations.htm][4]

  [1]: http://corycowgill.blogspot.com/2010/12/salesforce-winter-10-attachment-trigger.html
  [2]: http://boards.developerforce.com/t5/Apex-Code-Development/Attachment-Trigger-Not-Firing/m-%20%20p/591659/highlight/false#M108460
  [3]: http://boards.developerforce.com/t5/Apex-Code-Development/Trigger-after-insert-an-Attachment/m-p/70211#M4073
  [4]: http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#StartTopic=Content/apex_triggers_ignoring_operations.htm