I have a problem with Publisher using an excessive amount of memory. My pc has 8 Gb in total, and under normal circumstances memory use is 30 to 40% (as measured by Windows Task Manager). But I sometimes find that Publisher uses over 5 Gb of memory, which takes total memory use on the system to about 95%. Of course, not just Publisher but the entire pc then becomes unusable.
The problem occurs with one particular document, which is not particularly large on disk (about 12 Mb). It contains about 150 pages of A5 text and about 35 b/w bitmap images, each about 4 Mb in size. Until yesterday, the document could be edited easily enough. Its final frame had text in the overflow area and I autoflowed this into new pages (about 5 new pages). After that, Publisher's memory use increased to the level mentioned above.
I have tried saving a new copy of the document but that makes no difference. When I close it, Publisher gradually frees up memory until (with no documents open) it is using only about 300 Mb.