[NiteWave]

php stream files is not efficient.

if you can make use of litespeed's "Internal Redirect"(http://www.litespeedtech.com/support...ernal_redirect) feature in the script, will improve a lot. faster and use less resource(mem/cpu/process). And, the issue you reported may be gone.

this is not a direct reply to your issue, rather 's a comment. FYI.