[sf49ers1980]

Happy Holidays,
Help me!!
Upgraded to a 9900 on Christmas eve and love it but I'm having major problems with the phone "dropping" the wifi connection when I'm at home....
Right now it is on - as I am posting this from my BB - but it seems to just drop out when it pleases.
When it drops the wifi:
If I turn the wifi OFF on my BB then it connects via WAP or 3G (or whatever)
If I reeboot my BB then it reconnects to the wifi
But, when it drops wifi it will not connect to the net AT ALL. No Google, no Crackberry, no nothing. Not untill I either reboot my phone or turn wifi off.
I don't believe this is a problem with my service provider (Virgin Media UK)
Could this be an app related issue?
I can't say for sure but it seems to happen after I use Twitter. I upgraded from a 9700 and the only things I transfered accross was my Contacts.
I am yet to delete Twitter and test my theory as I wanted to know if you guys had any other ideas??

Apologies if I have posted this in the wrong place.
Any help would be hugely appreciated.
Happy Holidays.