An odd taste on my latest

[KevP]

Kegged my latest extract brew the other day and its a little odd tasting (yes I know its early, I was testing how it was clearing)

Its a bog standard brew just done for speed and reliability;
2550g Light Spray Malt
225g Crystal Malt
50g Challenger 60min
12g Goldings 10min
1 Protofloc 15min

Trouble is it smells ok but on having a little taste it is ok for maybe half a second then I get a strong sort of 'cheesy' taste and it really does need spitting out.
Never had a brew go this way and wondering if its going to end up in the drain, I'll keep it for a month more but wondered if anyone has any ideas?

[OldSpeckledBadger]

Maybe something to with yeast and the hot weather? I'll be bottling a batch of Old Speckled Hen clone in a day or two which has had to suffer at about 23C for the last few days and I'm wondering how well it will have coped.

[SiHoltye]

Old hops smell cheesy, don't know if this is carried through to the finished beer though.

[KevP]

Old hops smell cheesy, don't know if this is carried through to the finished beer though.

Oh, the Challenger I used carried a best before 04/09 but had been in the freezer since bought in November (loose bag of hops though)

[OldSpeckledBadger]

Oh, the Challenger I used carried a best before 04/09 but had been in the freezer since bought in November (loose bag of hops though)

They should be fine then. Have you used them in another brew recently?

[pauljmuk]

wasn't the grated parmesan you added to the FV was it?