In TS 2.5 when I compile and view PDF output I small window pops up to say that the pdf "does not look like a valid PDF document" and may be corrupt. The pdf still comes up, I just need to click Yes. It possibly has something to do with the fact that my document is not small (about 100 pages with 50 vector diagrams), but still it takes about 30-50 seconds to compile and view and it was fine in previous version.
The command I'm running is:
txs:///latex | txs:///makeindex | txs:///bibtex | txs:///latex | txs:///dvi-pdf-chain
I've attached the screenshot. I get this popup both on WinXP and Win7.