perfectblue issue

[Ollie1]

Hi everyone, i have been sent here as the tech guys thought you might be abe to help.

I am using vBulletin 3.6.4with the perfectblue style.
Plugins and mods:

Cyb - Advanced Forum Statistics
ibProArcade for vBulletin
Members who have visited the forum
Miserable Users
NoSpam!
Quick Account Switch
Separate Sticky and Normal Threads
vB Importance
Welcome Headers
Zoints Profile System
Zoints Thread Comments
Zoints Thread Tags
[Sniper] - Mood ManagerI have a user using Firefox 2.0.0.1 on Mac OSX 4.8. He is having display problems when starting a new thread and replying in advance mode. Screenshot attached.

I was wondering if anyone knew what may be causing the issue? I dont have the problem using IE.

Thank you in advance :)

[Ollie1]

i could really do with some help, if i havnt given enough info please say and i will provide more :)