fatal error with asort by opening an e-mail

[Christian Beuschel]

Hello developers!

I just installed RoundCube from:
        package: roundcube-webmail
        repository: universe
        version: 0.1-20051021ubuntu1
on my box:
        AMD Athlon XP 2200 with 512 MB RAM
        Ubuntu 6.06 LTS "Dapper Drake"
        Apache 2.0.55
        PHP 5.1.2
        MySQL 5.0.22

If I try to open an e-mail, I get this message:
>>>
Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to
allocate 10412 bytes)
in /usr/share/roundcube-webmail/program/lib/imap.inc on line 1390
<<<

I looked at the file an found:
1387:   // sort index
1388:   $i=0;
1389:   if ($flag=="ASC") asort($index);
1390:   else arsort($index);

Maybe you can help me getting this fixed.

Yours faithfully

Christian (Chris) Beuschel