[imp] Preview, Reply and Forward windows broken with certain mail messages

[Ruben Squartini]

Hi people!

I have been trying to migrate from Horde3 to Horde5 and found that many
messages are not shown in the preview window (Unable to view message in
preview pane. Click HERE to view the message in a new window.), some of
these messages have only text inside (no multipart or html), others are
multipart.

They appear correctly if I open them in a new window, but when trying to
reply or forward them, nothing is shown again as the original message in
the composer window, the only way is to switch to TXT to force it's
conversion.

These messages happen to be in utf-8 encoding (as everything is supposed to
be), if I modify by hand the "charset=utf-8" line in the mail and set
"charset=iso-8859-1" it shows perfectly in all windows (except special
chars, of course).

I checked the preferences and set to add the original message in the body
and as an attachement (and all other options, just in case) but they do not
appear whatsoever.

Tested this in two different mail systems (redirecting the same messages to
another domain also running Horde5), different browsers.

OS: Debian  6.0.7 (fully upgraded)
Apache2      2.2.16-6+squeeze11
PHP             5.3.3-7+squeeze15
Horde          5.0.4
Imp              6.0.4

Any idea what can be the problem?

Regards,
Ruben.