Problems with unzipping files

Several users have reported problems with unzipping the files. The most common error message is that pk-unzip or WinZip complain about the wrong CRC checksum, and refuses to unzip the files (or if forced to unzip, the programs won't work). CRC checksum or Cyclic Redundancy Check checksum is there for purpose and to check that the file is undamaged. In all cases so far, the original files have been correct, but they were damaged during downloading.

Hints

• Download files with SHIFT-CLICK in Netscape. Netscape may try to download the zipped file first on the screen, and this may damage the binary file. SHIFT-clicking forces Netscape to store the file directly in your system without displaying it first. I have no idea how this can be done with other browsers, but I'll add the instructions here if you inform me.
• Re-loading may not always help, since the files are cached, and the cached version was damaged. The cache or the caches may be anywhere between my and your computers. You may try to unable caching if you can, but this is very system dependent. Many people have reported that the problems disappeared when the file was downloaded to a computer in another domain, e.g., to a home computer.
• Contact me and ask me to send the file as an email attachment. However, you must yourself authorise me to send you huge (>100KB) binary email attachments, and check that you can receive them.