A9 Indexer repeatedly crashes after finding LXX.lbxlls resource file, which has same content as lxx.lbxlls downloaded by Logos 3 for Windows - diff shows no binary differences in 3110472 bytes for files.
Launch Logos4 A9, "Logging in …" appears along with blue Logos4 icon on menu bar - then icon disappears after few seconds and A9 keeps displaying "Downloading resources… (null)" until quit A9.
Couple relevant lines from Indexer-stderr.log:
01/03/2010 22:11:23 | DEBUG | 3 | LogosResourceDriver | Identifying resource file located at /Users/briggsr/Library/Application Support/Logos4/Data/qofvuuiv.o15/ResourceManager/Downloaded/LLS:1.0.301/LXX.lbxlls
assertion "nIndex >= 0 && nIndex < m_nSize" failed: file "../../../Libs/MFCLib/CObArray.h", line 99
By the way, modified /Users/briggsr/Library/LaunchAgents/com.logo.LogosIndexer.plist file to add "-stderr" and "-stdout" to indexer log file names, reflecting which file handle being used.
Since file system is case sensitive, did try renaming LXX.lbxlls to lxx.lbxlls - name change shows in Indexer-stderr.log, followed by same assertion message and stack trace.
Keep Smiling 
1537.Archive.zip">http://community.logos.com/cfs-file.ashx/__key/CommunityServer.Discussions.Components.Files/75/1537.Archive.zip:550:0]
For grins, used hdiutil to create case insensitive file system disk image. Moved user Library/Application Support/Logos4 content to different location, then used hdiutil to attach disk image to user Library/Application Support/Logos4 path and copy back previous content. Launched A9 several times with same LXX crash symptoms.