Thunderbird loses drafts under certain circumstances

Binary package hint: thunderbird

I've configured thunderbird to redirect everything to "Local Folders", so email from various accounts appears in the same place. I saved a draft of an email, and it seemed to save with no problems, but actually disappeared without a trace.
I worked out that I hadn't told each account to individually save drafts in "Local Folders", and changed the settings (which fixed the problem), but it would be nice if, when removing a top-level directory from the program, any references to it were redirected automatically. Or at the very least I should have had an error message telling me the save didn't work. (Or did it? is my email still there in some hidden place?)
Thunderbird version is version 2.0.0.6 (20071022) (from Help->About), and my Ubuntu is
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.10
DISTRIB_CODENAME=gutsy
DISTRIB_DESCRIPTION="Ubuntu 7.10"
Linux <host> 2.6.22-14-generic #1 SMP Fri Feb 1 04:59:50 UTC 2008 i686 GNU/Linux

Thanks to all for the fabulous software (I know it's not all you but for the bits you did...)

ProblemType: Bug
Architecture: i386
Date: Mon Feb 11 19:02:35 2008
DistroRelease: Ubuntu 7.10
NonfreeKernelModules: nvidia
Package: mozilla-thunderbird 2.0.0.8~pre071022+nobinonly-0ubuntu0.7.10
PackageArchitecture: all
SourcePackage: thunderbird
Uname: Linux hyram 2.6.22-14-generic #1 SMP Fri Feb 1 04:59:50 UTC 2008 i686 GNU/Linux