Problem with updating categories on a Posted Message

[girardtim]

I just found out what the problem is with the code, not sure why this is only a problem for Posted Messages, but this seems to fix it.

I wasn't aware there is an "add" field in the modifyItemRequest.updates that needs to be set when modifying an item.

In my request I need to set all three "add", "update", "delete"

1. set all the categories in the "add" field
2. set my other field updates such as body in the "update" field
3. delete categories in the "delete" field.

thanks for your help :)

-Tim