Calendar - always out of memory?

[betwixt1]

Here's a wierd problem for the experts:
PI 12, everything works as it should and works very well.
If I try to use the share/calendar function it throws up a message saying: "not enough memory". The size or format of the image makes no difference, and the machine has 1Gb of RAM. The temporary files are on a second HD with 30GB free. I usually run with the swap file disabled but just in case it really is a memory issue, I tried enabling it but it didn't change things. Task manager says there are plenty of resources free. I've done an uninstall, including removing the settings in the "documents and settings" folder and reinstalled again. It isn't a major issue as PI is normally used for DVD menus and touching up photographs prior to insertion in magazines (Adobe InDesign - Yuk!) and those features work fine. The machine is only a 550MHz P3 but apart from being a bit slow these days, it shouldn't give this kind of problem.
Any ideas anyone?

Brian.