Submitted by: @pavel-zotov

Script (CAUTION: do not keep any sensitive databases in C:\temp\, it can drop some of them!)

shell del c:\temp\1*.fdb 2>nul;

set list on;
set echo on;

create database "c:\temp\111.fdb" page_size 8192;
select mon$database_name as test_name_2 from mon$database;
commit;

create database "c:\temp\112.fdb" default character set utf8;
select mon$database_name as test_name_2 from mon$database;
commit;

show version;

Output on 2.5.9.27152:

TEST_NAME_1 C:\TEMP\111.FDB
TEST_NAME_2 C:\TEMP\112.FDB

Output on 3.0.8.33426 and 4.0.0.2387:

TEST_NAME_1 C:\TEMP\111.FDB
. . .
create database "c:\temp\112.fdb" default character set utf8;
Statement failed, SQLSTATE = 42000
Dynamic SQL Error
-SQL error code = -104
-Token unknown - line 1, column 17
-"c:\temp\112.fdb"

Commits: 005bc68 0656331