The Leopard problem happens while using the computer. The beta versions suffered the same problem, but it made it into release. 10.5.1 didn't fix it either...
Sometimes putting it to sleep and waking it again works, but it usually doesn't. Usually you can 1-2 minutes and it comes back, only to stop working again in a few more minutes.
A full restart fixes the problem until it recurs.
Modern GSM networks use HSDPA over UMTS.
Currently, the UMTS standard is available worldwide for use in 850, 900, 1700, 1800, 1900, 2100, and 2600 MHz bands. Additionally, it is expected the standard will be expanded for uses in the 450 MHz and 700 MHz bandshttp://www.3gamericas.org/English/Te...enter/umts.cfm
So is this confirmation that the Classic and new Nano run click-wheel variant of OS X? They have ARM processors and it seems like it would have been a massive job bringing quartz extreme-like window compositing and core animaton-like layered animations to pixo, a dead end operating system.