You can use Themeleon to upload your personal background. If you click on âImagesâ instead of âPatternsâ, youâll be able to upload your own background.
Anyways Thanx a ton Laura 
Not at this point. And because Themeleon is on the Design options page on Twitter, I am assuming it is a new way that Twitter is implementing to design their site. Which means, it is probably how Twitter wants us to use backgrounds now.
Need one more help?if possible?
You can upload your image using Themeleon and tile it there. It worked for me. 
ISHAOLM
#22
Thank You Laura! That Helped A Bunch!
This is a recurring problem. Cannot tile without it going to a premade theme. Please fix, ASAP.
@LauraORourke you rock my world.
I have the same problem, iâve been trying to tile the images i load but it keeps loading premade themes when i try to save the image i load and tile, or sometimes it doesnât even allow me to check the tile box. Please solve this problem ASAP. Thanks.
I encounter the same problem , when I click on an image and check tile background it wonât tile or will either result to a default premade theme that is the only one tiled ⌠Help me solve this problem at once thank you
Itâs driving me crazy! I havenât changed my twitter background in years! I logged in on my desktop for the first time in ages to change the background and now Iâm wishing I never touched it :(. I hope they fix it soon.
We are having the same problem.
I can upload a single image to the background, but if I try to tile it the background image then reverts to a previous one - this is one of the Twitter stock backgrounds. The tiling works fine in preview mode, its when you try to save it that it reverts back to the previous image.
Would be grateful if Twitter could properly resolve this asap
Awesome Thank you thank you thank you for that tip⌠My profile no longer sucks 
THEMELEON was what worked