Working with these kind of groups poses various challanges which are not seen in original newsgroups, for example threading may be badly broken but there are more interestin challanges.

In Fidonet Russian capital letter “H” has to be replaced with english letter “H” which look exactly the same but use different codes. The reason for this replacement is using Russian “H” as control sequence in FNT software.

For users it does not cause any problems but for us that is quite inconvenient as it breaks search for some of keywords. So we’ll probably need to detect replaced letters and replace them back.