Been playing around with site definitions lately and came across
the most random error. I had deployed a site definition solution to
my test farm and then all of a sudden I couln't access central
admin. The error was:
"Exception occurred. (Exception from HRESULT: 0x80020009
(DISP_E_EXCEPTION))".
This didn't mean much to me and google suggested that I rebuild
my site collection. In the end I fonud that there was a problem
with my WEBTEMP.xml file.
I Had added a site template configuration like this:
<Configuration ID="1" Title="Base Publishing Site (Hidden)"
Hidden="True" />
Which looks ok to me and I have seen a few samples that.
The missing element was the ImageUrl. So what I should have
is:
<Configuration ID="1" Title="Base Publishing Site (Hidden)"
Hidden="True" ImageUrl="/_layouts/images/blankprev.png" />
I'm wondering if this is something that has changed since SP1.
If you look in the SDK you can see that ImageUrl is specified as
Optional (http://msdn.microsoft.com/en-us/library/ms476942.aspx).