memory_limit disabled: No
If PHP's internal memory limit is turned on and if not set high enough Horde will not be able to handle large data items (e.g. large mail attachments in IMP). If possible, you should disable the PHP memory limit by recompiling PHP without the "--enable-memory-limit" flag. If this is not possible, then you should set the value of memory_limit in php.ini to a sufficiently high value (Current value of memory_limit: 8M).
Mail_Mime: No
You do not have the Mail_Mime package installed on your system. See the INSTALL file for instructions on how to install the package. THIS IS A REQUIRED MODULE!
Log: No
Make sure you are using a version of PEAR which includes the Log classes, or that you have installed the Log package seperately. See the INSTALL file for instructions on installing Log. THIS IS A REQUIRED MODULE!
Date: No
Horde requires the Date_Calc class for Kronolith to calculate dates.
Parts of Horde (HTML composition in IMP, Jonah, the XML-RPC client/server) use the HTTP_Request library to retrieve URLs and do other HTTP requests.
File: No
Horde will require the File class when importing CSV files.