Hi Martin
I use the 1.9.2.7-6a on my WL-HDD.
I have a cheap card reader MultiSlot - Reader/Writer extern 12 in 1 USB 2.0.
With the orig. 1.2.3.4 i had the same probs.
1.9.2.7-6a seems to automount (autodismount) the cards (also my usbstick) correctly.
But! Be aware that you have to configure your box 5-6 h before everyting is as comfortable as in 1.2.3.4
But i also have to mention that the 1.9.2.7-6a is of course more powerful!
My Asus Collection (just starting):
wl-hdd (1.9.2.7-6a, with HUB, USB-HDD, CARDREADER, CAM) Asus A3878GLP Notebook 15" Centrino 2,0 , 1024MB, 80GB, WLAN built-in, DVD+-RW