After some months of really hard work, I managed to take a look at one of the most annoying bugs people have found while using Modest. There was some problem in Tinymail with IMAP servers that do not support NAMESPACE. Basically users were not able to open their INBOXes, just the children mailboxes.
This morning I committed this long awaited fix. This bug was affecting among others people fetching mail from Oracle Beehive, Runbox, O2Online, and probably the most important one, GMX.de (German’s biggest provider of free email). Note that if you select GMX in your N900 it currently works fine because it uses the POP access as it is free of charge. IMAP access, the one that was not working, needs a paid account.
PS: as I mentioned in the bugzilla, you will get the fix with the next release of Maemo5 software.