error log entries

[anewday]

First time seeing the error about corrupt jpeg data. What does it mean?

2009-08-01 14:01:25.508	INFO	[88.80.x.x:51240-0#APVH_Default] File not found [/usr/local/apache/htdocs/pp/anp.php]
2009-08-01 14:06:01.946 [STDERR] Corrupt JPEG data: 1 extraneous bytes before marker 0xd9
2009-08-01 14:09:28.099 [STDERR] Corrupt JPEG data: 1 extraneous bytes before marker 0xd9
2009-08-01 14:20:02.306 [STDERR] Corrupt JPEG data: 1 extraneous bytes before marker 0xd9
2009-08-01 14:21:11.610 [STDERR] Corrupt JPEG data: 1 extraneous bytes before marker 0xd9

[mistwang]

The error is from PHP.