Encountered file association problems with Winamp, MPC-HC and Irfanview (should be more).
I cannot associate file types to those programs via their settings, even when ran as admin.
Everything needs to be done at the Default Programs control panel.
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Filenames with international characters display as squares, the characters display sometimes but sometimes its squares.
Win 7 was good with international filenames.
Some reference and a workaround:
Fix Japanese Text in Windows 8 (displaying squares)? - gdgt
Windows 7/8: Japanese font/kanji occasionally displaying as squares - Super User
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Search doesn't search my indexed locations.
Checked the folder in "Indexing Options" and it doesn't search there.
Unchecked all the picture file types but it still show them in search results.
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Win 8 really need to clean up all those small problems.
Waiting for new versions of software to fix Win 8 related problems.
Now is the period of change.