Such a shame the length of that 3rd absence. If that had been much shorter then you would not now have a problem!
You only count the number of days wholly outside the UK. So the 1st absence is only 5 days, the 2nd is 260 days, and the 3rd is 71 days .... total = 336 days. Had your day count been 300 or less then there would not be a problem, but if you look at
this UKBA document, and 4.1.2 in particular, you will see what you are up against.
As you are applying under section 6(2), as the spouse of a British Citizen, it is the numbers in brackets that you need to read, such as 300 and 480.
My conclusion? Unless there was a very good reason for the absences, see 4.1.2.c or 4.1.2.d, consider waiting until the 1st week of March 2011 before applying. But do ensure that the application is with UKBA before 08.03.2011, otherwise you will not have been in the UK exactly 3 years before the application date.
But that is only my view ..... other opinions very welcome.