sometimes when checking email, we get a few blank emails. usually they are together; 2 or 3 emails are blank, (at least: the body is blank).

the email settings are IMAP and we connected an imap client and the mails in question did show ok...

i have no idea why suddenly a few mails have troubles showing, if i uncheck the plain text checkbox, i still see nothing.

Ubuntu
Version 4.5.1 (Build 1197)
Apache 2
PHP 5.1.2
mysql 5.0.22