Null Signature console spam

[WTFFFS]

Running Forge .473 (latest I believe) MC 1.4.6 and 50 odd mods I am getting some console spam in the Multi-MC console it is also in the Forge log, sample follows

 

2012-12-23 13:43:03 [sEVERE] [ForgeModLoader] The mod BuildCraft|Core is expecting signature null for source buildcraft-A-3.3.0.jar, however there is no signature matching that description

2012-12-23 13:43:03 [sEVERE] [ForgeModLoader] The mod BuildCraft|Energy is expecting signature null for source buildcraft-A-3.3.0.jar, however there is no signature matching that description

2012-12-23 13:43:03 [sEVERE] [ForgeModLoader] The mod ExtrabiomesXL is expecting signature null for source ExtrabiomesXL-universal-1.4.6-3.7.0a.jar, however there is no signature matching that description

 

I get one line for every mod I have installed (hence it's a sample my console log and forge log themselves are kinda big), just asking is this ignorable since it is flagged as a severe warning?

[luacs1998]

Blame FML for trying to get every mod to sign their files.

[cpw]

Is that a problem lua?

[luacs1998]

Is that a problem lua?

No, that isn't a problem (to me at least).

Though it would be nice if that was toggleable...

[flashman111]

Im having the exact same problem? can't anybody help?

[luacs1998]

Leave it alone, leave it alone, it's just monsters in your dreams...