I uploded the upgrade package to my site, then went to my site expecting to see the usual installation transcript. But, no, it simply went to my home page with the green 'Updates Available' indicator still showing. I.e., the installation script dd not get started. I've done these upgrades often in the past, and this is the first time one has failed like this. To be sure, I reinstalled the site from backup, then tried the upgrade again. It still failed. Am I missing something with the 6.2.3 upgrade process?? Thanks.

Great. I ran the site as indicated ... the browser window went blank and has remained that way. Is an upgrade taking place ... after an hour of blank? I certainly have no idea about what may or may not be going on in the bowels of DNN. Any other insight / recommendations?

Well, this is bizarre. The site is showing the little green box 'Upgrades Available', but host settings is showing my version as 6.02.03. What should I believe? It never sis show me that it was going through an upgrade process, just the blank screen, but I was able to open a new window and login as host (seeing the green Upgrade Available box). Now I'm really confused.