Apologies, you're right, the buckles covers are shown on the waist, not the legs.I don’t see anything for the leg loops on the current picture
I've got 3 of the new orange web harnesses for work. The webbing has a slick feel to it unlike any caving harness I have used. It is polyester not nylon webbing which "maintains smooth adjustment over time", and polyester ropes are typically less absorbent of water than nylon, which probably means less mud ingress too.Reading between the lines it seems that they're using a new material for the webbing that prevents it from going stiff and not being adjustable when dirty. But it's clearly too slippery to stay in place.
But the above fix just looks dodgy to me - it may work, but a manufacturer supplying rubber bands to fix a defect they designed in is really not acceptable, considering there's no backup in the event of a failure.
I contacted Petzl via the link given by @Ian Ball and received the following email reply:
"
Hello Paul,
Thank you for your email. The anti-slip keepers should be available towards the end of January / early February.
I will keep your email and post them out as soon as they arrive.
Kind regards,
Naomi
After Sales Service
Petzl UK Aftersales
petzl.co.uk
"