Project has never done a good job of clearing up after changes and file bloat is quite common. Try a simple Save As… to see if that works. If not, there may be some corruption – you could try the suggestions in FAQ Item: 43. Handling project file corruption and/or bloat. FAQs, companion products and other useful Project information can be seen at this web address: http://project.mvps.org/faqs.htm
Hope this helps – please let us know how you get on 🙂
Glad it worked – try it again. The size of a project file depends on many other things than just the number of tasks, For instance, you could have a 5 task project with 100 resources assigned. Or you could have one resurce with manually entered Work that varies day by day for months.
Appreciate the tip. For the good of the order, I have had the same experience with Project 2007. The file is about 300 or so tasks with about 20 resources. It grew over time to over 4 MB. The save as technique worked in that it reduced it to just over a MB.
I have had the same problem this morning did a save as and he file shot from 10MB to 20MB. I took all the colour out of the plan and it reduced back down to 9MB. Still rather large though but was surprised that colour to text would add such an increase the file size.