10.4.8- dimmed screen & wireless won't work

I downloaded the latest Mac update 10.4.8 and ever since my screen looks dim or darker. Not as bright and vibrant as it used to. I have read other posts of it looking blueish. I bet this is the same thing others are describing.
In addition, my wireless mouse and keyboard quit working. Anyone heard of any easy way to fix this or do should I wait for an update? (I am new to Macs.)
I have an iMac. Thanks for any suggestions.
iMac Mac OS X (10.4.8) 1.8GHzPowerPC G5 512MB DDR SDRAM

sorry your going through this as a new mac user. I've been using mac's now for about 20 years and 10.4.8 is the first really bad and IMHO defective update they've ever released. Just sit tight as Apple is great at addressing these issues and with all the posts here I'm sure they're working to resolve the problems.
As for the wireless, my problem was fixed by clicking on "Use Interference Robustness" in the drag down window, upper right hand corner where the 5 bars are to show airport signal strength.
Also search for info on 'preferred networks' here. That modification in network preferences helps as well.
As for the darker screen. Can't help you with that one.

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Inbound IP Filter Rules
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No. Status Access Protocol Source
Interface Source
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Port Op Destination
Interface Destination
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Port Op Log Enable
Disable Delete
122 P,E permit GRE any any any N/A any any any N/A No Protected Protected
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2000 P,E deny TCP any any any any any 127. 0. 0. 1 host = 53 No Protected Protected
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2004 P,E deny UDP any any any any any 127. 0. 0. 1 host = 53 No Protected Protected
2202 P,E,N permit UDP any any any any any 127. 0. 0. 1 host = 68 No Protected Protected
2206 P,E,N permit TCP any any any any any 127. 0. 0. 1 host = 7547 No Protected Protected
2228 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 12526 No Protected Protected
2230 P,E,N permit TCP any any any any any 192.168. 1. 64 host = 12526 No Protected Protected
2238 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 16402 No Protected Protected
2240 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 32141 No Protected Protected
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