Dear colleagues, after having dug tons of material I have understood one thing- if one has a stock ROM/stock firmware, CWM won't work with it 100% on the Galaxy Mini. I have already installed on my rooted Mini CWM 5.2.0.8 and while it is able to make cache partition it cannot make a backup saying something like "unable mount/system"

As I don't like very much neither customed cars nor customed firmware, well, may be only a little, my question is: if I install a custom ROM only and don't touch anything else, would the CWM work as it should, with the backup able to be done? Thank you for any info.