Bug 343873

Platform is Trisquel 7, an Unbuntu derivative. Motherboard is an Intel D865GLC with 3GB of memory, recently upgraded to 4GB (moved to another identical motherboard).

Emails were retrieved from a network attached storage drive, to which the profile had been uploaded from a WinXP, SP3 installation running Thunderbird email client.

Emails that are mostly irretrievable are from a folder containing ca. 13,500 emails. These are all OK in the original installation.  Total about 800MB. There were many duplicate emails which KMail atttempted to remove.

I can repeat the transfer process if need be and if some trials are anticipated.

KMail 4.13.3 is the version; installed from the Trisquel repository with apt-get.

Here is the complete error message, which I get every time I try to open an email in the folder list and the loading fails:
"Unable to fetch item from backend (collection 0): Unable to retrieve item from resource: Invalid item retrieved"
 This is what I get for about 95% of the emails that I have retrieved from various sources. No other error messages are apparent, even with dmesg in Terminal.

One much larger folder (several GB) will not open at all.


Reproducible: Always

Steps to Reproduce:
1.Load various email profiles to NAS - all in one folder;
2.Retrieve with KMail; KMail grabs every profile in one "go;"
3.KMail organizes everything automatically in Trisquel 7 installation;
4.Attempts to read any email in most folder gives error message; 
5.Most messages are irretrievable; some folders are OK.

Actual Results:  
Shall I erase all 10GB in the KMail installation and start over ? This is a days-long process.
I'm reluctant to stick my finger in the piranha tank again anytime soon.