When I click on the Download Icon, it works for a while and then I get a blank screen. I have to sign back into Joomla. It never asks me where to save the downloaded data.
When clicking the download icon you should be taken to the download page.
It sounds as though there are either permission or file ownership issues on /administrator/components/
com_export_content/... causing problems.
You could try making everything 777 just to see if the problem goes away.
Please make sure you uninstall export content as soon as you have finished moving the data as files set to 777 may be a security risk.
Or if your not sure what file ownership means please search the Joomla forums as there is plenty of info on it.
A few other things to check.
Have you got the correct version of export content installed?
You should have version 1.7.0 installed on Joomla 1.0+ site.
And version 2.0.0 on Joomla 1.5+ site.
Have you got iconv lib enabled on the source site.
Note: If you have PHP5+ iconv lib is normally enable by default but if it's PHP4+ you may need to get your host to look into for you.
Please let me know how it goes, thanks.
