Here is my console log showing the failure to install 3 files [logged in as root]: TinkerTool, XOptimize, Sharity.

Apr 18 10:02:19 localhost WindowServer[51]: MPHWBlit Composite: surface copy fails (-536870201) ... disabling.

file://localhost/System/Library/Extensions/msdosfs.kext/ is not a valid kernel extension bundle.
file://localhost/System/Library/Extensions/msdosfs.kext/ is not a valid kernel extension bundle.
file://localhost/System/Library/Extensions/webdav_fs.kext/ is not a valid kernel extension bundle.
file://localhost/System/Library/Extensions/webdav_fs.kext/ is not a valid kernel extension bundle.
/dev/disk1
hfs: unknown user id: unknown
Apr 18 10:02:39 localhost autodiskmount[78]: DiskVolume_mount_foreign: There is a filesystem error with the device disk1 which was attempting to mount at /Volumes/TinkerTool12a

Apr 18 10:02:39 localhost autodiskmount[78]: disk1 ??? hfs no no TinkerTool12a [not mounted]

/dev/disk1
hfs: unknown user id: unknown
Apr 18 10:03:20 localhost autodiskmount[78]: DiskVolume_mount_foreign: There is a filesystem error with the device disk1 which was attempting to mount at /Volumes/TinkerTool12a

Apr 18 10:03:20 localhost autodiskmount[78]: disk1 ??? hfs no no TinkerTool12a [not mounted]

/dev/disk1
hfs: unknown user id: unknown
Apr 18 10:05:31 localhost autodiskmount[78]: DiskVolume_mount_foreign: There is a filesystem error with the device disk1 which was attempting to mount at /Volumes/Xoptimize v0.1

Apr 18 10:05:31 localhost autodiskmount[78]: disk1 ??? hfs no no Xoptimize v0.1 [not mounted]

/dev/disk1
hfs: unknown user id: unknown
Apr 18 10:06:55 localhost autodiskmount[78]: DiskVolume_mount_foreign: There is a filesystem error with the device disk1 which was attempting to mount at /Volumes/Sharity.2.4

Apr 18 10:06:55 localhost autodiskmount[78]: disk1 ??? hfs no no Sharity.2.4 [not mounted]