Any how, the 1.3 dev version is absolutely slow saving a lot of files in one action. Might be a GUI problem. Not usable at all.
I add 2000-5000 Files in one step, adding is fine, the acustic match works fine as well but when I mark all the tagged files on the right and say "save" - Picard freezes. In background, its still working as i can see files beeing saved to the new location - but it takes roudn about 20 seconds for one single file.

I has similar problems in acustic id and saving as well - when the gui doenst hang it seems to help to select a single entry (not the XXXX entries which seems to be "active" on some actions) - maybe Picard tries to update the GUI and has to run through all selected items, i dont know...

It shoould also be possible to multithread the filesaving process. Thanks!