Redmine

After updating from 1.4 to 2.3.0 version, I have got a problem with e-mail processing.
Very often the subject of ticket, created from e-mail, was cut for 25 or 50 chars.
Sometimes the text of ticket cut to 395 chars.
We are using Excnage 2010, and Russian chars.
Early it was a problem with attachments, named in Russina with spaces. Tickets creatde missing this attachments.
But now it's a big problem, because we had to communicate with user and ask about lost info.

Redmine installed on CentOS,
Emails reciving by pop3 protocol in cron task.