The DX2 has an apparent memory allocation issue and is likely the root cause of most issues. Go into the task manager and add up the OS, home ui, OS tasks, opened user apps and free ram. There is nothing close to 512mb ram and if we assume that 404mb is available and 108mb allocated to the gpu, there still a gap of about 130mb missing ram.
Add random reboots, MP3 click & pop sounds and heat spikes, the firmware is flaky at best.
In regards to the memory, some users are touting use of a memory mod script, Super V6, but that was intended for 256mb ram devices like the Droid 1. This BTW does not work well, since after a few hours, the ram is back down to less than 40mb.
Perhaps a Gingerbread update will fix the issues, but that will be pure luck, considering Motorola level 2 techs insist nothing is wrong. Their responses (I kid not)
Random reboots = stock reset the device
Flash heat spikes = stock reset the device
MP3 clicks and pops = Try using a faster microsd card
Missing RAM = The device has 512mb ram- stock reset the device
I returned my DX2 just before the 14 day deadline. If Gingerbread fixes the noted issues, I will happily buy another one, since the DX2 is several fixes away from great.