PgAdmin 1.10.0 rev 7948 OSX crashes upon adding pgAgent job step

Hello,

I'm running pgAdmin 1.10.0 rev 7948 on Mac OS X 10.5.4. I'm using the
official package.
When creating pgAgent jobs, if I try to add a job step without first
saving the whole job, pgAdmin crashes. To reproduce:

Jobs->New Job->Steps->Add->(fill in some step details)->OK

Bang.

If I add a new job, then save it, then add a job step to it later, it
doesn't (always) crash.

This is all in conjunction with PostgreSQL 8.4.0.

Thanks very much,

Charles Duffy