When I had been flashing ROMs etc...while the update was installing in recovery I noticed I got this line that said something about formatting sd-ext....formatting sd-ext skipped or unsuccessful (something along those lines). So...I was looking in root explorer today and noticed on the root of my phone / there is NO sd-ext folder there. Only my Sdcard folder is there. My girlfriends phone has one (sd-ext folder) on there. So...I mounted R/O, added new folder, looked at permissions that she had and granted my sd-ext folder the same permissions. Mount R/W...back out. Reboot my phone...and the sd-ext folder disappears. Not there anymore. How important is this folder and what exactly is its function? My phone is running fine...no probs at all...Im just curious as putting 2 and 2 together... Also, in Clockwork mod recovery, the partitions menu...there is a selection to format sd-ext....should I do this and see if it puts that folder back on my / any thoughts. Can anyone out there please check your own / in root explorer and see if you have the sd-ext folder. My girls sd-ext folder has nothing in it...so...not sure what thats all about.