UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support Problems with uploading avatars

I have a member who's having a problem getting their avatar uploaded/changed.
I don\t know what to say to them....

Here's their query:
Rob,

Been trying (many times) to upload a new avatar image. It is a jpeg 100x100 pixels, about 30K in size. Is there a problem on the website's end?

ideas anyone??

thanks...>Rob