I upgraded to 3.5.3 yesterday, and began installing this today. As soon as I edited vbulletin_global.js, my forum and admincp performance dropped significantly, I was unable to open a template and I could no longer expand groupings in the admincp navigation. I rolled back the vbulletin_global.js change, and instantly these problems disappeared. Should mention that I also installed Johannes'
Who viewed this thread plugin a few minutes previously (and have not removed).
Any ideas?