Sleepers,
With the upcoming 1.1.20 patch, we are making a change that will fix a bug that allowed building Pentashields without proper support. As a consequence, all Pentashields built in this way will collapse when the patch goes live.
If you have any Pentashields built this way (not attached to the walls but to one another), please rebuild them properly to avoid losing your base.
The current ETA for the patch is August 12. In the meanwhile, 1.1.20 is available in the Public Test Client now, you can read more about it here.
See you on Arrakis, Sleepers.