Mistaking the web for the net
This is said to be a common error, but it turns out to be so common that it even affects Latinists:
http://la.wikipedia.org/wiki/Interrete:
Interrete (-is, n) (Anglice: internet) totum mundum computatris connectat. Multi sunt servi, ubi paginae domesticae (in forma .html) et data varia locatae sunt. Computatra clientes vocata data a servis accipent, saepe ad paginas domesticas inspiciendam. Ductus electronici multa data transportant.
Interrete inventus est Genavae, in aedibus institutionis Europaenae CERN vocatae.
That is:
The Interrete (genitive Interretis; neuter) (in English: Internet) connects the whole world through computers. There are many servers where home pages (in HTML format) and various data are located. Computers called clients receive data from the servers, often in order to view home pages. The electronic paths carry much data.
The Internet was invented in Geneva at the facilities of the European institution called CERN.
This kind of error could seriously undermine the credibility of the Latin Wikipedia.
