Hi.
Well, I think I have found a bug in /splay. I'll explain it:
My default "sounds" dir is Resource\Sounds\. Now I have some waves files (internally compressed in mp3 44.1KHz/128Kbps) in it.

If, for example, I do '/splay start.wav' it works.
If I do '/splay Resource\Sounds\start.wav' it works.
But if I put another different sound file in another directory under mIRC, with the same name and the same format/compression (example, in my case, 'Resource\Skin\Test\') and I do '/splay Resource\Skin\Test\start.wav' it play the file in the default sounds dir (Resource\Sounds)!!
But if i do '/splay C:\mIRC\Resource\Skin\Test\start.wav' (in my case it's a bit longer path, but without spaces and with a short foldername for each folder) it works.
Other sound files with a filename different from the other in the default sounds dir (ex: start1.wav -> '/splay Resource\Skin\Test\start1.wav') works perfectly.

Bye!