after the 5.02 update
Web Browser : Mozilla/4.0 (PSP (PlayStation Portable); 2.00)
Product code : CEK
System details : 5.00 (SX; system=5.02)
Application in use : psp-radio
Radio plug-in : PSP-2000:RadioPlayerCore_5.0.0
AAC+ support : Yes
Memory total : 12582912
Memory in use : 3178496
Free memory : 9404416
Hmmm....
I though that something changed but it's the same specs as the 2000 so nothing to worry about.
Going to stay with my (now hacked) Slim & Lite.