[in world all my friends are offline but when i check the site it says they are online how do i fix?]

My gf logged on last night and couldent see me online  neather could i. Then today all my friends are offline and i knew it wasnt right so i went to SL.com and they was online. Please if anyone has this problem or has a answer please respond.

[my GF is wearing alpha but on her screen she is not help ???]

My gf is wearing alpha but on her screen its perfectly fine i think its somthing to do with cache please help D: !!!!!!!