I haven't tried 374 yet, but at least up to 372 I've two problems that have existed for a while.
1. High memory usage - I think others have mentioned it, but I've seen MC quickly go up to as high as 700MB of swap memory usage. I have no idea what causes this, and I can't repro it on demand, but it happens reasonably frequently. I'm running on Vista, if it matters.
2. Auto importing files in excluded folders - I have my M:\ path set to be auto imported. In addition I have my M:\Recycle Bin path to be excluded. Despite this the Recycle Bin is included, most likely because it is a sub-path of the first one. BTW, this Recycle Bin is not a standard Windows one. It is a folder created by my NAS when I delete files.