[Dovecot] sieve / managesieve: unknown Sieve capability 'imapflags'

[Ralf Hildebrandt]

$HOME/.dovecot.sieve.log reports:

main_script: line 8: error: require command: unknown Sieve capability 'imapflags'.
main_script: line 8: error: require command: unknown Sieve capability 'notify'.
main_script: error: validation failed.

I'm using sieve (not cmusieve) and managesieve with dovecot-1.2.
SquirrelMail 1.4 is using the avelsieve plugin to created/edit the
sieve rules.

What am I doing wrong here?

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de