>>>IMHO, you can have _ and . in the file name/path.
>>
>>If it were for invalid characters in the file name/path, then most of the characters in the posted file name are valid, so, the following file name is valid
>>
>>file2001abc5%9#ƒ-@ ŠÊóŸumo]@.jpg
>
>Right - though I prefer to only use English letters in file names.

I don't - simply because I got files in several languages, and I don't see any technical limitation nowadays, why would a name of a file in some other language be in English.