It is definitely within forum guidelines, and I am more then a little miffed that it was removed not once but twice without even a PM as to why when it is definitely within the rules.
The second time it was:
QUOTE
"Images in signatures shall NOT exceed a total of 300x100 (30,000) and 80kb.
You can enter max 4 lines of text in signature or signature image."MODS: Image is 450x34 (15,300) and 8.7KB it is WITHIN rules.

You can enter max 4 lines of text in signature or signature image."MODS: Image is 450x34 (15,300) and 8.7KB it is WITHIN rules.

I would love to know why it was removed not once but twice even though it is plainly within the sig rules.