diff --git a/qemu/README.md b/qemu/README.md
index 23607bf..065adbe 100644
--- a/qemu/README.md
+++ b/qemu/README.md
@@ -37,6 +37,15 @@ Documented guest deviations from production, set by stage-2 init:
 `WARDEN_HPMCU=0` (no mailbox SRAM on virt; flared >= flare-edge#106 fix
 required, or the daemon dies of SIGBUS).
 
+**The VM's kernel is ahead of the panels' in one way that shows in the UI.**
+It is built from `build/warden_defconfig` plus `configs/virt.fragment`, so it
+has `CONFIG_BRIDGE`; the vendor 5.10 kernel most panels still run does not.
+A Client-mode access point is bridged to the wired uplink and needs that, so
+the Wi-Fi page offers it in the VM and says "Needs Router mode: this kernel
+cannot bridge" on a 5.10 panel. Both are correct for the kernel underneath.
+The difference disappears as panels move to the 6.18 build, but until then a
+screenshot from here is not evidence about a 5.10 panel's Wi-Fi page.
+
 ## Quick Start
 
 ```sh