Powerbook G4 "Freezes" I have included error log

Question

*Hello all*, I have a 1.5Ghz 1.5 ram 15" Powerbook G4 that randomly freezes. I know many are knowledgeable here. I receive the dimmed screen with a error notice to use the power button to turn off computer, no options given. I purchased this machine on Ebay with included Tiger disks. I have performed two clean installs to no avail. I have included the most recent error log below. Three possible related issues are the 1. ical doesn't show current date in Dock (July 17) which from discussion boards doesn't seem related. ps I have done all the suggestions to no avail. 2. Widget icon in Dock shows "on" with small black triangle, but is not selected, which doesn't seem right, however finder stays on or activated too maybe a Tiger thing.... 3. The 1 Gig of ram is 3200 at 400mhz but this seems a non issue as it will clock at the prescribed 333mhz. and shows OK.
To resolve I have re-installed, repair disk option and manually ran the daily, weekly and monthly processes with Terminal. I hope I have given you all the facts needed. Thanks For Your Efforts. PS would Leopard be the only answer at 150.00 ish and or new Crucial 2 Gig of proper pc2700 ram?
SODIMM0/J25LOWER:
Size: 1 GB
Type: DDR SDRAM
Speed: PC3200U-30330
Status: OK
SODIMM1/J25UPPER:
Size: 512 MB
Type: DDR SDRAM
Speed: PC2700U-25330
Status: OK
Tue Mar 9 10:11:21 2010Unresolved kernel trap(cpu 0): 0x300 - Data access
DAR=0x000000006099F534 PC=0x00000000003005F0
Latest crash info for cpu 0:
Exception state (sv=0x3D281A00)
PC=0x003005F0; MSR=0x00009030; DAR=0x6099F534; DSISR=0x40000000; LR=0x003005CC; R1=0x22023C10; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x003005CC 0x002CF238 0x002CEC5C 0x002CECAC 0x002EDBC8 0x0008DEC4
0x00029234 0x000233F8 0x000ABEAC 0x00000000
Proceeding back via exception chain:
Exception state (sv=0x3D281A00)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x39B22780)
PC=0x9000AF48; MSR=0x0000D030; DAR=0x00343F20; DSISR=0x40000000; LR=0x9000AE9C; R1=0xBFFFF3D0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x000954F8 0x00095A10 0x00026898 0x000A8204 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x3D281A00)
PC=0x003005F0; MSR=0x00009030; DAR=0x6099F534; DSISR=0x40000000; LR=0x003005CC; R1=0x22023C10; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x003005CC 0x002CF238 0x002CEC5C 0x002CECAC 0x002EDBC8 0x0008DEC4
0x00029234 0x000233F8 0x000ABEAC 0x00000000
Exception state (sv=0x39B22780)
PC=0x9000AF48; MSR=0x0000D030; DAR=0x00343F20; DSISR=0x40000000; LR=0x9000AE9C; R1=0xBFFFF3D0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC

Answer 1

Tiger 10.4.11 is a very stable operating system, well suited to a 1.5Ghz 1.5GB Powerbook. Your system has the horsepower to run Leopard fine, although it's possible you may want to max out the memory at 2GB at some point, depending on the work you do on the system. I wouldn't move to 10.5 because I thought it would be more stable, rather, a move to 10.5 might be called for since some new/upgrade software products are starting to require 10.5 as the minimum operating system (that's why I upgraded).
For Leopard, here are some sources. The ebay listing is currently $52 with 17 hours to-go. Be careful you don't buy a gray systems disk for another mac system, like an iMac or MacBook, as those won't load on a Powerbook since they are locked to the system type they were shipped with. Stick with the black retail disks, which includes the upgrade DVD that shipped as an extra DVD with the early Leopard systems. It requires you have Tiger installed, and does the complete install from there.
http://www.buycheapr.com/us/result.jsp?ga=us2&q=macleopard10.5
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120538949513
I did look up where I bought my 10.5 upgrade from, and they want $189.