SymptomsLog rotation service is configured to retain more that two daily log files. After upgrade to Parallels Plesk 9.5.3 version only logs for the past two days are being kept. Parallels Plesk does not use custom log rotation settings but uses the default settings.
ResolutionFor fixing this problem copy statistics.exe file from attachment into %plesk_bin% directory.
Note: statistics945.zip file is fix for Parallels Plesk 9.5.4 version.