I've just created a new channel; after populating it with content, I went to view it in the front end to find the channel:entries tag outputting zero content. On checking the channel's entries in the back end I discovered that none of the data I'd entered had been retained. I've tried re-entering data several times but it's never retained.
There's nothing weird about this channel; it consists of a single Grid field that is basically a near-exact copy of a Grid used in another channel -- which works fine. (The only difference, other than a different field name, is the removal of one column).
I've looked through the channel preferences (which, in any case, I created by duplicating the other Grid channel's prefs at the time I created the problematic channel) but can't see anything that might prevent a channel from storing data.
Can anyone suggest anything that might be causing this refusal to retain data?
[Additional info: when I originally created the channel I set it to make use of the 'Single Entries' add-on. I've removed it from that add-on so that it's now a 'normal' channel again, but it makes no difference; data is still not retained].