I did noticed a possible bug on how logs are rotated / compressed on my Interworx server… I did noticed on my server that my http transfer logs always seems to have data since about 13h to about 9:30 of the next day (I did checked all the compressed logs and all of them seems like that)… then there is everyday some data missing for about 4h every day!! I’m not fully sure, but I think it’s on these 4h that logs get rotated, reverse dns it’s done and statistcs get computed… also I did already noticed before that within such 4h there are no transfer.log and error.log files on the logs folder(s), they seem to get “missing” after the zip for the previous day log get’s done and they only seems to get back after httpd is apparently restarted automatically near the 13h…
After reading “Log Rotation” at http://httpd.apache.org/docs/2.0/logs.html I guess the problem may be that logs are moved/gzipped/or something similar at 9:30 and httpd is only restarted at 13h (after all reverse dns, statistics, gzip… done?) then causing the problem… please staff look at sorting this when possible… it’s no good to get 4h of logs missing every day! also guess statistics may also miss such data… 
I don’t know how rotation is currently done exactly… but maybe a solution would be to move all log files (for all sites) to temporary files (or folder), then immediately do a graceful restart of httpd to force it create new log files and only then start processing (reverse dns, statistics, gzip…) the log files on the temporary files…
Just to leave the info on this topic, the problem was fixed on v4.10.1, following a support ticked about it. Now perfect, thanks 