The shower separation panels in the guest heads in the starboard hull, will warp after some time. The plexiglas material expands at higher temperatures. Because they are bolted to a stainless frame that does not expand, the plexiglas warps. The solution is easy. Remove the panel, increase the bolt hole diameter and reinstall. Don’t tighten the fixing bolts too much, because the material should be able to move a little when it expands.