I found this thread incredibly helpful and wanted to update it to the latest version. Here's the contents of that variable for the current version of vB:
Code:
Array
(
[showsignatures] => 1
[showavatars] => 2
[showimages] => 4
[coppauser] => 8
[adminemail] => 16
[showvcard] => 32
[dstauto] => 64
[dstonoff] => 128
[showemail] => 256
[invisible] => 512
[showreputation] => 1024
[receivepm] => 2048
[emailonpm] => 4096
[hasaccessmask] => 8192
[postorder] => 32768
[receivepmbuddies] => 131072
[noactivationmails] => 262144
[pmboxwarning] => 524288
[showusercss] => 1048576
[receivefriendemailrequest] => 2097152
[vm_enable] => 8388608
[vm_contactonly] => 16777216
)