Corel X7 TIFF Export Problem

Hello,

First time poster, user since ver. 8.

Having a major issues when I export to TIFF. Basically any time I try to export a 4'x8' it blows the file up to massive size and that's even if it's usable. For years I have battled issues with exporting corel files for large format printers. If I ever have a drop shade effect and attempt to export as an EPS, the drop shadow is printed as a dark rectangle without the desired feathering, the same would happen if I attempt to publish it as a PDF. The one thing I could trust was TIFF. Now a TIFF export is out of the question and Corel has become unusable in our sign shop. In the past when I managed a sign shop for an Anheuser-Busch wholesaler we would print to onyx right from Corel so these issues weren't as big of a problem....except for occasions when I would print a long cooler wrap with drop shades then exporting to TIFF would solve any issues.

Is Corel aware of this issue? This has happened on multiple machines all running Win 7 64-bit. I can attest this IS a bug.