I have noticed that, on the emulator, CSendUi crashes in it's destructor when a CreateAndSendMessageWithSubjectL() call has been made. In my particular case, I added an attachment to an email and saved the email in Drafts.
If no send has been made, the destructor doesn't crash.
It is also possible to observe the same crash when using the builtin file manager to create and send an email with an attachment.
This is on the latest S60 3rd edition MR release.
Sander van der Wal