In Twelfth Night, what is Malvolio's main conflict in the play?

It is Act II scene 3 that clearly shows with whom Malvolio
is in conflict in this excellent Shakespearian comedy. Note how, when Malvolio
interrupts the late night festivities organised by Sir Toby Belch, he is harsh in his
condemnation of such activities:

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My masters, are you mad? Or what are you? Have
you no wit, manners, nor honesty but to gabble like tinkers at this time of night? Do
you make an alehouse of my lady's house that ye squeak out your coziers' catches without
any mitigation or remorse of voice? Is there no respect of place, persons, nor time in
you?

It is important to
realise that the play's title, Twelfth Night, refers to a festival
which is not celebrated any more, but which represented the last celebrations of
Christmas before the long, hard winter months ahead, characterised by Lent (a time of
fasting). Traditionally, Christmas decorations are taken down on Twelfth Night to
indicate this. In the play, it appears that Sir Toby Belch represents the true party
spirit of Christmas that will not yield, whereas Malvolio, described as a "Puritan,"
represents sobriety, seriousness and duty. Note how, in response to Malvolio's words,
Sir Toby Belch responds as follows:

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Dost thou think, because thou art virtuous, there
shall be no more cakes and
ale?

This appears to be the
central conflict concerning Malvolio: he is set against Sir Toby Belch and represents
order, duty and denial, whereas Sir Toby quite clearly represents excess and
chaos.