Upgrade given: J - F, (Y - J with miles 1 day before travel)
Upgrade location: At the check in(?) (in GLA)
Route: DXB-KUL
Flight number: EK346
Type of ticket: Flex (exactly: one way Flex Y, but return Saver J)
Date of travel: 03 Aug 2010 (long time ago, but maybe good to notice as I was only Blue, almost no miles, name start with L, looks like just good luck)
Tier status: Blue
Skywards miles balance:almost 0 after upgrading from Y to J
Number of pax on the same PNR: Single
Skywards DOJ (approx): 2008 (always only Blue)
And of course the first letter of your surname! L

I noticed it on the plane from DXB, not earlier, although new seat number was on the board pass printed in GLA