Comment 2 for bug 897660

I can confirm this bug.
I encountered this bug the other way round: I can not install idanish as ispell 3.3.02-5 is installed

$ lsb_release -a
LSB Version: core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric

$ sudo apt-cache show idanish | grep Version
Version: 1.6.25-1

$ sudo apt-cache show ispell | grep idanish
Breaks: iamerican (<= 3.1.20.0-9), ibritish (<= 3.1.20.0-9), ibulgarian (<= 3.0-12), iczech (<= 20040229-5), idanish (<= 1.6.25-1), iestonian (<= 1:20030606-12.1), ifinnish (<= 0.7-17.3), ifinnish-large (<= 0.7-17.3), ifrench (<= 1.4-25), ifrench-gut (<= 1:1.0-27), igaelic (<= 0.50-7), ihungarian (<= 0.99.4-2), iirish (<= 2.0-20), iitalian (<= 1:2.3-2), imanx (<= 0.50-8), inorwegian (<= 2.0.10-3.2), iogerman (<= 1:2-26), ipolish (<= 20100612-1), irussian (<= 0.99g5-8.1), iswedish (<= 1.4.5-2), iukrainian (<= 1.6.0-1)

Aptitude also diagnoses this nicely:
$ aptitude why-not idanish
i ispell breaks idanish (<= 1.6.25-1)