Gonna chime in just as a data point. Batch 8, running FW 1.2.2. Not one freeze, glitch in the three weeks or so I've owned it. Files are 95% FLAC and few hi rez ALAC. About five minute scan time on a 64GB Sandisk microSD card. Same-ish with a 32GB Sandisk (they were essentially the same files as the 32gb). I'm able to stop the startup scan by simply pushing the "X" on the screen then, back to listening. Loving this device with all my headphones. I use the Shure SE215 when walking (very very good, HP Out), V-MODA M-100 (really helps the M-100 clear up, HP Out) at times around the house and also the Senn HD600s with the DX50 amped by a JDS Labs C5 (Line Out). For SQ, I like it better than my Rockboxed iPod Video and the iPod Classic 160GB. More detail compared to the iPod Video and more musical vs. the iPod Classic. Just enjoying the unit immensely and sorry if you're one having problems.Feeling no need to go to FW 1.2.5 but watching updates for suitability.