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When I use \usepackage[all]{xy} and \xymatrix{} the arrowheads are not printing or viewing correctly. I have typeset for years and this problem only popped up when I changed operating systems a few months ago. If I use ps2pdf on my postscript file, the pdf file views and prints as it should. However I need a good postscript file too. I noticed a posting here about a file being missing from the package. Could that be causing my problem?

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closed as not a real question by lockstep, Stefan Kottwitz Nov 5 '11 at 21:15

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Welcome to TeX.SE. It is always best to compose a MWE that illustrates the problem including the \documentclass so that those trying to help don't have to recreate it. – Peter Grill Oct 5 '11 at 14:49
We had a question about something similar before, could you take a look at: tex.stackexchange.com/questions/16619/… and see if the answer there solves your problem? – Loop Space Oct 5 '11 at 15:16