Mac OSX and PIL-box

[cruff]

I've just installed pyilper using the miniconda method (which completed cleanly) on BigSur 11.6.5. When I attempt to start pyilper I get the following fatal error:

TypeError: invalid result from cls_AspectLayout.heightForWidth(), 'float' object cannot be interpreted as an integer

Has anyone seen this before?

goldfinch% conda info

active environment : None
shell level : 0
user config file : /Users/cruff/.condarc
populated config files : /Users/cruff/.condarc
conda version : 4.12.0
conda-build version : not installed
python version : 3.9.7.final.0
virtual packages : __osx=10.16=0
__unix=0=0
__archspec=1=x86_64
base environment : /opt/miniconda3 (writable)
conda av data dir : /opt/miniconda3/etc/conda
conda av metadata url : None
channel URLs : https://conda.anaconda.org/bug400/osx-64
https://conda.anaconda.org/bug400/noarch
https://repo.anaconda.com/pkgs/main/osx-64
https://repo.anaconda.com/pkgs/main/noarch
https://repo.anaconda.com/pkgs/r/osx-64
https://repo.anaconda.com/pkgs/r/noarch
package cache : /opt/miniconda3/pkgs
/Users/cruff/.conda/pkgs
envs directories : /opt/miniconda3/envs
/Users/cruff/.conda/envs
platform : osx-64
user-agent : conda/4.12.0 requests/2.27.1 CPython/3.9.7 Darwin/20.6.0 OSX/10.16
UID:GID : 8264:1500
netrc file : None
offline mode : False