Issue: VM conversation full of (blinding) colours

A question which I posted in the knowledge based:

Is there such a thing such as a VM conversation customisation? ie. customising the conversation (VMs) between you and the others?

If no, why do others see my VM conversation with these colours?

I see my VM conversations normally, with the theme I'm currently using.

I thought it was connected to the profile colours, so I tried reverting my profile back to default but didn't work.

May I add that I apparently had this problem since last year (approximately Autumn 2011) because one member once mentioned the VM being red but back then I didn't think it was my problem since only 1 told me.