Are they arriving as split up now in TMT? They shouldn't be because we do support long SMS and they should be being displayed as one single message. If not send your login information to firstname.lastname@example.org and we'll look into it.
Thanks for the info Laura, we found a problem where we don't put back together again your long messages properly. We think this is a problem with us and your phone (SE K800i). We're going to see what we can do!
We have added a small fix for the problem you experienced Kerim, also now private messages should not be being tweeted. This fix doesn't relate to the problem Mudkin has which we're are still trying to replicate but without success.
Small but significant progress update. We have discovered that certain combinations of handset and network operator do not support the automatic formatting of long SMS that we use to put the messages back together. We are looking for a way to workaround the issue.
This ones going to be tricky. After more investigation there isn't much in the SMS we receive for us to be able to piece these back together reliably. The only solution for now seems to be to change handset. We'll try to think of a magic workaround.