That ended up being an ill-fated attempt at humor.I presume you mean curtain in the tub or outside the tub?
It's a dual curtain, fabric curtain that stays outside the tub with an additional plastic/vinyl curtain that goes in the tub.
I haven't had an issue since I got a curved rod, but I rarely take a shower in that bathroom. We have a shower in the master bath and a shower in the downstairs bath, but this bathroom is the only one that has a tub, and I usually do a soak there rather than a shower.