[imp] Horde 4.0.14 / IMP 5.0.19 / Trouble with dynamic interface

[Florent TETART]

Hi all,

First, thank you all for this nice Groupware, wich is exactly what I 
need for my company.

I installed Horde 4.0.14 / IMP 5.0.19 (I followed the quick setup guide) 
on a Ubuntu 11.10 with all the defaults packages (apache, mysql, etc.) 
from the distro.
Everything works fine except for IMP in dynamic mode. I often get the 
following js error that makes the inbox stay empty :

TypeError: this.data.get(o.key) is undefined
this.data.get(o.key).VP_rownum = o.value; (log in the console of firebug 
in Firefox)

It happens what ever the size of the mailbox (I have the same error from 
a mailbox with 50 messages as well as a mailbox with 6500 messages).

I changed the parameters of the php.ini file to have a long execution 
time (300s), a big memory limit (128Mo), I cleaned the browsers cache, I 
changed the timeout parameter for the Imap backend to 100, I 
disabled/enabled the cache, with the file driver or Sql driver, there's 
no error message in horde logs, no error message in apache/php logs, the 
responses to the ajax queries viewPort and listMailboxes seems to be 
good (firebug can interpret the returned json structure ), I searched 
for two days in Google, mailings lists and I can't understand why...

The only clues I found :
-There's the suhosin patch on my apache2 php module but as I read, it 
should works
-It works for a few users  (even with big mailboxes) in dynamic mode
-It always works in classic mode
-I found a mail : 
http://lists.horde.org/archives/imp/Week-of-Mon-20111128/052961.html 
with the same problem where the IMP version mentionned is 5.0.15. 
Michael M Slusarz answered it was fixed in IMP 5.0.14

So I don't know what to do more to find a solution if any. I may use the 
classic interface but the dynamic one is so nice...

Florent,
www.sigb.net