Patting oneself on the back...thoughts? People in Managerial positions please.?

in my lab we had a problem with erroneous results. for quite a few months we were all stumped. Theories were tossed around but nobody had hard facts. I told my supervisor that I was keeping track of patients and their results and other important facts that could support the theory that the blood had been sitting here at my lab too long before being processed. I did research, printed out my report and sent it to the director, he was pleased. We came up with a solution. My supervisor is now trying to take all credit for this finding. She actually sent all of us an email and in the first sentence states: "They say self praise is no praise, but in this case I am going to pat myself on the back for a job well done!" then she goes on to explain in detail how she had come up with this idea all on her own and told them that she had asked me to keep an eye on the records. (Which I had told her I would do and had been doing before she came and saw me) What would you think of someone actually stating that they are patting themselves on the back? Would you think it was deserved or would it look tackya nd look like they are trying to take credit for something that wasn't theirs? What would this statmetn say to you?