I am running the BOINC client 5.2.13 on a Linux machine. This machine is connected to the internet via another Linux machine with a SQUID proxy (2.5-STABLE6).
At the end of last year the German Einstein server had some trouble and delivered defective files. This was fixed but my client still got MD5 checksum errors when downloading any new file. The same happened some days ago when Seti had some trouble with network connections.
In both cases I could only fix this by stopping the SQUID and erasing its cache. After SQUID was restarted the next download went well.
It seems that the BOINC client loads the files again and again from the cache, even if the files there are defective for some reason. Would it not be better if the client told the cache to load a fresh copy of a file each time (the function you get with the 'reload' button in a web browser)?

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Squid cache can be configured to reload into ims
which causes it does *not* honor browsers "refresh" requests anymore

Thus read carefully squid documentation and configure it properly

Mine is configured to after 12 hours, of a file sored into its cache
do a http://head to original cherrshost, to check IF the file has same size
before serving a file from cache

ps: I am wondering how einsteim programmers managed to to recompie the client
software after changes on code, keeping the "same size" of that executable

*and also why they did not changed the file-name to show the new version

Other projects do it -:) see
C:\\Program Files\\BOINC\\projects>ls boinc.bio.wzw.tum.de_boincsimap
simap_5.05_windows_intelx86.exe

the 5.05 on the above .exe is the version of this application

cheers

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