We recently moved our website, with two different WordPress (2.0.6) based blogs, to a different server. Everything went fine, without any obvious problems.
Except for one: One of the blogs frequently "forgets" the selected theme and after a few hours simply shows the default theme instead.
This strikes me as very odd and I cannot find any reason for this behavior.
The custom theme is based on k2 and worked fine on the old server and seems to work fine on the new server, except that after an hour or two, the default theme is shown instead. The admin-panel then shows the default theme as currently selected theme, too. Everything looks normal and the way it is supposed to be, except that it's just not the theme we wanted.
The current solution to this problem is to simply rename the default theme and put the custom theme in the default folder. That works fine, but isn't really elegant and I hope it doesn't have to be a permanent solution.
Does anyone else experience this weird behavior and might know what causes it?
Every other setting, every other part of both blogs (with different databases and settings) works perfectly normal.