What's new in Informix 7.3?

Can anyone point me somewhere where I can find out what's new in Informix Dynamic Server 7.3 that wasn't there in 7.2x? We had two problems with 7.2 which I'm hoping (but not expecting) were resolved in 7.3. The first is Informix's lack of case-independent indexes. There was no way to do a case-insensitive search and still be able to use an index. Databases such as Sybase/Microsoft SQL Server allow this. The second problem was that Informix's biggest variable-length text field only allowed you to store 256 characters. If you wanted to store more than that, you couldn't do things like "LIKE" searches. SQL Server has a TEXT type which will store up to 32K of data and you can still do LIKE searches. If anyone could tell me if these problems have been resolved, I'd appreciate it. Otherwise, if you know where I can find a good description of what is new in version 7.3, please let me know. Thanks, Jay