Maximum signature dimensions

I was trying to change my signature recently and was having a hell of a time implementing it using the same (if not less than) dimensions of the set I am currently using. For whatever reason, I would have to take this signature to 119x100 in order to be displayed with my Last.FM signature. As you can see, with my current set total length is more than with this new configuration yet VB is saying my total dimensions are over the limit. File size is not the problem as it is well below the max. I don't know if the PHP generated sig is getting penalized or I am just overlooking something obvious? I have tried an old GW signature that uses roughly the same dimensions and it also said it was too big when used along with the scrobbler sig (keep in mind I had used this before in the same setup.) So obviously something is up, as the combined dimensions are 385x259 and about 13KB total. Now I would prefer not to make any changes, for fear of being unable to go back to the existing configuration after doing the headphone chain avatar/sig witout drastacly reducing the image size.

Jam it back in, in the dark.