MODX 3: Generated "[[!…" (don’t cache) tags seem not to work anymore

It is still a rather rudimentary site. Installed extras are:

  • Ace 1.9.2-pl
  • Collections 4.0.0-beta1
  • examplemodxblog 0.0.2-dev1 (modified)
  • getPage 1.2.5-pl
  • getResourceField 1.0.3-pl
  • getResources 1.7.0-pl
  • GoogleSiteMap 2.1.2-pl
  • Markdown Editor 1.1.0-pl
  • pThumb 2.3.3-pl
  • Resizer 1.0.2-beta
  • Tagger 2.0.0-alpha1
  • translit 1.0.0-beta
  • UpgradeMODX 2.3.1-pl