Comodo Antivirus blocks Thunderbird abook-1.mab

Windows XP - all service packs
Comodo Internet Security Premium version: 5.12.256249.2599
Thunderbird: 17.0.7

With anti virus activated (intelligent / on every access) Thunderbird throws error:
“Unable to load address book file abook-1.mab. It may be read-only, or locked by another application.”

When anti virus is disabled, this error does not occur and the address books are loaded normally.

Please investigate, thank you!

Actually, we are no longer accepting bugs for V5 issues. Version 6.2 is now released on the forum. If you like you can upgrade to it by following the advice I give here.

Also, I will move this to the HELP section of the forum, as I believe this is an issue which can be solved without making changes to the code.

Also, can you let me know whether you disabled just the AV component of CIS, or did you also disable the Defense+ component?