I love MediaCenter and for some time now it replaces iTunes as my music library but there still are many things that show that this is originally a Windows application translated to the MAC.
You are correct that MC for Mac isn't *quite* as polished as MC for Windows. There are several Windows specific features missing from MC for Mac. There are also numerous little weird behaviors on MC for Mac. Some of which we don't even know about. Like this one! Luckily Bob and team have verified your bug/problem and are in the process of fixing it.
MC for Mac isn't perfect. But I wouldn't trade it for any other media player available for the Mac. I can't think of one I'd rather use, even that crazy priced one that costs close to $400 US.
Also, a point of clarity: MC for Mac isn't a "port" in a traditional sense. A "port" normally means that someone re-writes a program starting from one platform and ending on another platform. The "port" is an entirely separate software product and remains separate once it's done.
MC for Mac is TOTALLY different. Before JRiver wrote MC for Mac, they re-wrote the underlying core of MC for Windows and build an Operating System abstraction layer. What this means is, all JRiver has to do to move MC to a new Operating System, is write the abstraction layer for the new target OS. All of the code that really makes MC work is THE SAME ON ALL OSes! Which is really amazing if you think about it.
It means that version 23.0.62 is the SAME for Windows, Mac, and Linux. All the features and bug fixes are common across all platforms. That being said, there are still OS specific behaviors that are odd. There are things that have to be specifically fixed for one OS and not another. It's not perfect. But WOW is it cool that all the core code is the same. Features show up in all versions at nearly the same time without having to be specifically "ported" to Mac or Linux. They just show up from the main code.
Brian.