Wikimedia Bugzilla is closed!

Normally during installation when an error occurs, the submitted information is redisplayed and the 
user is given a big red message saying something like "Correct the fault below and resubmit", but 
not in the instance when an invalid database name is given.

I tried to call my database "mwdb_1.6.7" but this is invalid (though "mwdb_1_6_7" is OK).  It took 
me a little while longer to figure out what was wrong and how to get back (hitting "back" in the 
browser).  

I suggest that an invalid database name is treated in the same way other errors are treated: 
redisplay the submitted data, give an error message, and point to the field in error.