Just opened the folder in the Finder and tossed the file. Found that with a search for the name 'systempreferences' there were a number of system botched up preferences.
In fact, all the ones with crazy characters after their name are ones that were saved and never renamed to take the place of the old one. For some reason the system tries to replace the file each time instead of just modifying the file.
When a bunch of files named like this:
com.apple.iChat.plist.NjbY4gA
com.apple.iLifeAssetManagement.crash.plist.m6AGw5b
com.apple.Preview.SandboxedPersistentURLs.LSSharedFileList.plist.XRAmUck
not only are those files trash, it is very likely that the same file without the garbage at the end:
com.apple.iChat.plist
com.apple.iLifeAssetManagement.crash.plist
com.apple.Preview.SandboxedPersistentURLs.LSSharedFileList.plist
are corrupt and are causing you grief. It is a good ideas to throw out the file ending in garbage and the corresponding one that ends in just '.plist' so the app can recreate the preference again.
Never had so many prefernces file corruptions in Mac OS 9 with resource forks. Resource forks had self validation, checksums and the whole nine yards. These plist text files are always getting corrupted.