In fairness to Thomas, I too have sometimes observed prints nestled up against the dividers while washing. Since they are completely submerged there is no issue of sticking, or anything like that. Because they will slide out smoothly there must be a thin water barrier separating the prints from the dividers. But they are sometimes very close.
When I first got the washer I did a Kodak HT-2 residual test and it turned out fine. However, after Thomas' comments I think I'll repeat that next time I wash prints, just to see what's up with it when the prints move over to the dividers.
My sense has always been that with fiber-based papers - the only kind I wash in it - the residual chemistry would leach out sufficiently through either side of the print. But since Thomas is reporting anecdotal evidence that may be at a variance with that, I will retest.
For the record, I also wash all of my hanger-developed negatives in the Versalab as well. This includes 4x5s on the 4-up hangers, 5x7s on the 2-ups, and 8x10s. I fashioned a pair of 1/8-inch brass rods into submerged racks with white nylon spacers. These hang over the sides of the washer and will suspend up to 10 hangers completely under water in the middle of the tank, once the print basket has been removed. The film hangers then sit parallel to the water jets and 3/4 of an inch apart.
This is a nice secondary use of the unit that keeps me from having to purchase yet another washer for my sheet film negatives. I don't have much space left in my smallish darkroom anyway. Double duty is always a good thing.
Ken