We're seeing a problem when we try to play a large mp3 podcast via http 
(file length is known).

We've already got these features defined (as suggested by greg) which 
fixed playback of fixed length mp3 files via http (smaller files than 
the podcast we're trying to play).

project.AddDefines('HELIX_FEATURE_HTTPFSYS_MEM_GROWTH_LIMIT')
project.AddDefines("CHUNK_RES_MEM_FLOOR=128000")
project.AddDefines("CHUNK_RES_MEM_CEILING=256000")

When playing the file a PNX_* file is created in /tmp which grows until 
we run out of memory.

We'll check what's getting reported by
HXBOOL CHTTPFileObject::IsLiveStream(const char* pMimeType)

In the meantime do you have any suggestions ?

John