id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host
8083,"Virtualbox-4.0.0-69151-OSX.dmg fails to install, but installs anyway?",Penelope Fudd,,"This MacOSX Snowleopard 10.6.6 (just updated) system had VirtualBox-3.2.4-62467-OSX.dmg installed, and today I attempted to upgrade to VB 4.0.0-69151.  Downloaded the dmg, opened it, double-clicked on VirtualBox.mpkg, clicked next,next,next until it got to the last step (Summary), where it said:
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There were errors with the installation.  You may want to try installing again.
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The installation failed.

The Installer encountered an error that caused the installation to fail.  Contact the software manufacturer for assistance.
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In /var/log/system.log, I found this:
Jan 14 10:17:51 shechinah VirtualBoxVM[364]: VirtualBoxVM(364,0x111901000) malloc: *** error for object 0x10380ce08: incorrect checksum for freed object - object was probably modified after being freed.\n*** set a breakpoint in malloc_error_break to debug
Jan 14 10:17:55 shechinah ReportCrash[367]: Saved crash report for VirtualBoxVM[364] version 3.2.4 (3.2.4) to /Library/Logs/DiagnosticReports/VirtualBoxVM_2011-01-14-101755_shechinah.crash

I've attached the crash report.

However, when I started VB to report what version I was upgrading from, it claimed 4.0.0!

This successful ""failure"" is not the way things are supposed to work; it makes the product look bad.",defect,closed,installer,VirtualBox 4.0.0,obsolete,failed,,Linux,Mac OS X