DotNetNuke Underconstruction.htm
If you're having problems with your DotNetNuke site, mainly every time the site loads the first time (after the site has been reset), going to the install/underconstruction.htm file, here's a quick tip.
Check the VERSIONS table in your database, we were having an issue with this on a recent test site and when I checked the versions table it was completely empty.
I corrected the problem by adding a Version entry for 4.5.3, which is the DNN version that this particular site was running.