I cannot seem to save changes in the page composer. It happened with changing field metadata, custom snippets. Sometimes I can tell based on the save button lit or not. Sometimes I just don't know for sure if changes are save. Sometimes I reload the page and the snippet was completed deleted.
This is now fixed in the new Brooklyn (10.0.9) release which is now available on the Skuid Releases page.
As a reminder, Salesforce does NOT allow reverting back to prior versions of managed packages. Skuid always recommends installing new versions in a non-business critical sandbox environment to test all mission critical functionality before installing into a production environment. We also recommend that you update out of date themes when you upgrade.