If your not aware yet, the My Notifications are actually stored in the "Record Link" table (love SQL Profiler...)
So I am dumping some notifications in there. (Note that the "To User ID" which identifies who to notify IS case sensitive)
I am attempting to place a string in the Note (BLOB) field, but get the error when I run the client (RTC) "Unable to read beyond the end of the stream"
So as a test I exported a Note BLOB field from a Record Link I created using the client (RTC).... its just text.