i've one same file, in 2 sites on my small apache web server, first is within apache's root directory, other is within subdirecotry.
ok, now, basically open with browser file from root dir, it really works fine.
however when i open file from subdirecotry, i recieve a mistake "Content Encoding Error The page you are attempting to see can't be proven since it uses an invalid or unsupported type of compression".
i actually do use deflate inshtaccess, and delay pills work fine (have examined with page speed opera wordpress plugin, no issues with that).
are you able to produce some clue where can generate problems? can there be a problem with my gzip, or it's with... i'm not sure......
UPDATE 1: deflate is determined with next two lines:
UPDATE 2: here's Mind a part of my files