OK Tried rDesktop 0.4 again: first message [? Downloading rdesktop failed]
This is the log file:
hildon-application-manager 2.0.2
apt-worker: Not handling unrelated package libenchant1c2a.
apt-worker: Not handling unrelated package libhunspell-1.1-0.
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Installing rdesktop 0.4
apt-worker: Not handling unrelated package libenchant1c2a.
apt-worker: Not handling unrelated package libhunspell-1.1-0.
apt-worker: Not handling unrelated package libenchant1c2a.
apt-worker: Not handling unrelated package libhunspell-1.1-0.
Failed to fetch http://repository.maemo.org/extras/p...0.4_armel.deb: Could not open file /media/mmc2/.apt-archive-cache/partial/rdesktop_0.4_armel.deb - open (30 Read-only file system) [IP: 213.254.238.161 80]
W: Not using locking for read only lock file /media/mmc2/.apt-archive-cache/lock
W: Not using locking for read only lock file /media/mmc2/.apt-archive-cache/lock

BTW, I'm haveing intermittent problems reading my MiniSDHC card on my PC. I finally managed to get it to read the card and open the saved log file. (The card was almost full of music but has plenty of space for this log)
Derek