Bloated image again. Memory leak?

Hi guys,
I have this problem (http://forum.world.st/Huge-image-td4876854.html), now the image grow about 100MB per week and the suggestions shown on http://forum.world.st/Huge-image-td4876854.html don't work

I'm on Pharo 5 on a mac.

I suspect it is something related to GLMPanePort, see the attached jpg
Can you help me please?

TIA
Davide